Classification Term: 282
Tryptamines and derivatives (ontology term: CHEMONTID:0000183)
Compounds containing the tryptamine backbone, which is structurally characterized by an indole ring substituted at the 3-position by an ethanamine." []
found 40 associated metabolites at sub_class metabolite taxonomy ontology rank level.
Ancestor: Indoles and derivatives
Child Taxonomies: Serotonins
Tryptamine
Tryptamine, also known as TrpN, is a catabolite of tryptophan converted by the gut microbiota. After absorption through the intestinal epithelium, tryptophan catabolites enter the bloodstream and are later excreted in the urine. Both Clostridium sp. and Ruminococcus sp. have been found to convert tryptophan into tryptamine (PMID: 30120222). Tryptamine is a monoamine compound that is a common precursor molecule to many hormones and neurotransmitters. Biosynthesis generally proceeds from the amino acid tryptophan, with tryptamine acting as a precursor for other compounds. Substitutions to the tryptamine molecule give rise to a group of compounds collectively known as tryptamines. The most well-known tryptamines are serotonin, an important neurotransmitter, and melatonin, a hormone involved in regulating the sleep-wake cycle. Tryptamine has been detected, but not quantified in, several different foods, such as onion-family vegetables, acerola, Japanese walnuts, custard apples, and green zucchinis. This could make tryptamine a potential biomarker for the consumption of these foods. Tryptamine is an aminoalkylindole consisting of indole having a 2-aminoethyl group at the 3-position. It has a role as a human metabolite, a plant metabolite and a mouse metabolite. It is an aminoalkylindole, an indole alkaloid, an aralkylamino compound and a member of tryptamines. It is a conjugate base of a tryptaminium. Tryptamine is a natural product found in Mus musculus, Prosopis glandulosa, and other organisms with data available. Occurs widely in plants, especies Lens esculenta (lentil) and the fungi Coprinus micaceus (glistening ink cap) An aminoalkylindole consisting of indole having a 2-aminoethyl group at the 3-position. KEIO_ID T031
5-Methoxytryptamine
5-Methoxytryptamine, also known as mexamine or 5-MT, belongs to the class of organic compounds known as tryptamines and derivatives. Tryptamines and derivatives are compounds containing the tryptamine backbone, which is structurally characterized by an indole ring substituted at the 3-position by an ethanamine. It is biosynthesized via the deacetylation of melatonin in the pineal gland. 5-MT acts as a full agonist at the 5-HT1, 5-HT2, 5-HT4, 5-HT6, and 5-HT7 receptors. 5-Methoxytryptamine exists in all living organisms, ranging from bacteria to humans. Its affinity for the 5-HT5A receptor is unknown. It has no affinity for the 5-HT3 receptor and is affinity for the 5-HT1E receptor is very weak in comparison to the other 5-HT1 receptors. 5-MT has been shown to occur naturally in the body in low levels. Serotonin derivative proposed as potentiator for hypnotics and sedatives. [HMDB] KEIO_ID M040
N-Methyltryptamine
N-Methyltryptamine (NMT), or monomethyltryptamine, is a tryptamine alkaloid that has been found in the bark, shoots and leaves of numerous plants. (wikipedia). N-Methyltryptamine was detected in urine from all autistic patients with mental retardation and epilepsy and many autistic patients (32/47) with mental retardation (PubMed ID 8747157 ). N-Methyltryptamine (NMT), or monomethyltryptamine, is a tryptamine alkaloid that has been found in the bark, shoots and leaves of numerous plants. (wikipedia)
Sumatriptan
Oftentimes, serotonin levels in the brain become extremely erratic before the onset of a migraine. In an attempt to stabilize this, sumatriptan is administered to help aid in leveling the serotonin levels in the brain. Sumatriptan is structurally similar to serotonin, and is a 5-HT (5-HT1D) agonist, which is one of the receptors that serotonin binds to. The specific receptor subtype it activates is present in the cranial and basilar arteries. Activation of these receptors causes vasoconstriction of those dilated arteries. Sumatriptan is also shown to decrease the activity of the trigeminal nerve. Sumatriptan is a triptan drug including a sulfonamide group structurally similar to serotonin, and is a 5-HT (5-HT1D) agonist, which is one of the receptors that serotonin binds to. Oftentimes, serotonin levels in the brain become extremely erratic before the onset of a migraine. In an attempt to stabilize this, sumatriptan is administered to help aid in leveling the serotonin levels in the brain. A serotonin agonist that acts selectively at 5HT1 receptors. It is used in the treatment of migraines. Sumatriptan (Imitrex, Imigran, Imigran Recovery) is a triptan drug including a sulfonamide group which was originally developed by Glaxo for the treatment of migraine headaches. Oftentimes, serotonin levels in the brain become extremely erratic before the onset of a migraine. In an attempt to stabilize this, sumatriptan is administered to help aid in leveling the serotonin levels in the brain. Sumatriptan is structurally similar to serotonin, and is a 5-HT (5-HT1D) agonist, which is one of the receptors that serotonin binds to. The specific receptor subtype it activates is present in the cranial and basilar arteries. Activation of these receptors causes vasoconstriction of those dilated arteries. Sumatriptan is also shown to decrease the activity of the trigeminal nerve.; Sumatriptan is a triptan drug including a sulfonamide group structurally similar to serotonin, and is a 5-HT (5-HT1D) agonist, which is one of the receptors that serotonin binds to. N - Nervous system > N02 - Analgesics > N02C - Antimigraine preparations > N02CC - Selective serotonin (5ht1) agonists D018377 - Neurotransmitter Agents > D018490 - Serotonin Agents > D017366 - Serotonin Receptor Agonists C78272 - Agent Affecting Nervous System > C47794 - Serotonin Agonist D002317 - Cardiovascular Agents > D014662 - Vasoconstrictor Agents Sumatriptan (GR 43175) is an orally active 5-HT1 receptor agonist with IC50s of 7.3 nm, 9.3nm and 17.8 nm for 5-HT1D, 5-HT1B and 5-HT1F receptors, respectively. Sumatriptan can be used for migraine headache research[1][2][3][4].
Dimethyltryptamine
An N-methylated indoleamine derivative, a serotonergic hallucinogen found in several plants, especially Prestonia amazonica (Apocynaceae) and in mammalian brain, blood, and urine. It apparently acts as an agonist at some types of serotonin receptors and an antagonist at others.; DMT is a derivative of tryptamine with two additional methyl groups at the amine nitrogen atom. DMT is often synthesized by the Speeter-Anthony synthesis from indole using oxalyl chloride, dimethylamine, and lithium aluminium hydride as reagents. DMT is usually used in its base form, but it is more stable as a salt, e.g. as a fumarate. In contrast to DMTs base, its salts are water-soluble. DMT in solution degrades relatively fast and should be stored protected from air and light in a freezer. Highly pure DMT crystals, when evaporated out of a solvent and depositing upon glass, often produce small but highly defined white crystalline needles which when viewed under intense light will sparkle, and appear colorless under high magnification. In labs, it has been known to be explosive under a certain degree of heat.; DMT is a powerful psychoactive substance. If DMT is smoked, injected, or orally ingested with an MAOI, it can produce powerful entheogenic experiences including intense visual hallucinations, euphoria, even true hallucinations (perceived extensions of reality). A trip sitter is recommended to assist the drug user in staying physically and mentally healthy, and, in the case of smoked DMT, to catch the pipe if the user loses awareness of it.; DMT is classified in the United States as a Schedule I drug. In December of 2004, the Supreme Court lifted a stay thereby allowing the Brazil-based Uniaeo do Vegetal (UDV) church to use a decoction containing DMT in their Christmas services that year. This decoction is a tea made from boiled leaves and vines, known as hoasca within the UDV, and ayahuasca in different cultures. In Gonzales v. O Centro EspArita Beneficente Uniaeo do Vegetal, the Supreme Court heard arguments on November 1, 2005 and unanimously ruled in February 2006 that the U.S. federal government must allow the UDV to import and consume the tea for religious ceremonies under the 1993 Religious Freedom Restoration Act. There are no drug tests that would show DMT usage. None of the basic NIDA 5 drug tests or any extended drug test will show a result for DMT.; Dimethyltryptamine (DMT), also known as N,N-dimethyltryptamine, is a psychedelic tryptamine. It is not to be confused with 5-MeO-DMT and is similar in chemical structure to the neurotransmitter serotonin. DMT is created in small amounts by the human body during normal metabolism by the enzyme tryptamine-N-methyltransferase. Pure DMT at room temperature is a clear or white crystalline solid. DMT was first chemically synthesized in 1931. It also occurs naturally in many species of plants. DMT-containing plants are used in several South American shamanic practices. It is one of the main active constituents of snuffs like yopo and of the drink ayahuasca.; Oral ingestion: DMT, which is broken down by the digestive enzyme monoamine oxidase, is practically inactive if taken orally, unless combined with a monoamine oxidase inhibitor (MAOI). The traditional South American ayahuasca, or yage, is a tea mixture containing DMT and a MAOI. There are a number of admixtures to this brew, but most commonly it is simply the leaves of Psychotria viridis (containing DMT), and the vine Banisteriopsis caapi (the source of MAOI). Other DMT containing plants, including Diplopterys cabrerana, are sometimes used in ayahuasca in different areas of South America. Two common sources in the western US are Reed canary grass (Phalaris arundinacea) and Harding grass (Phalaris aquatica). These invasive grasses contain low levels of DMT and other alkaloids. Taken orally with an appropriate MAOI, DMT produces a long lasting (over 3 hour), slow, but deep spiritual experience. MAOIs should be used with extreme caution as they... Dimethyltryptamine is an N-methylated indoleamine derivative, a serotonergic hallucinogen found in several plants, especially Prestonia amazonica (Apocynaceae) and in mammalian brain, blood, and urine. It apparently acts as an agonist at some types of serotonin receptors and an antagonist at others. DMT is a derivative of tryptamine with two additional methyl groups at the amine nitrogen atom. DMT is often synthesized by the Speeter-Anthony synthesis from indole using oxalyl chloride, dimethylamine, and lithium aluminium hydride as reagents. DMT is usually used in its base form, but it is more stable as a salt, e.g. as a fumarate. In contrast to DMTs base, its salts are water-soluble. DMT in solution degrades relatively fast and should be stored protected from air and light in a freezer. Highly pure DMT crystals, when evaporated out of a solvent and depositing upon glass, often produce small but highly defined white crystalline needles which when viewed under intense light will sparkle, and appear colorless under high magnification. In labs, it has been known to be explosive under a certain degree of heat. DMT is a powerful psychoactive substance. If DMT is smoked, injected, or orally ingested with an MAOI, it can produce powerful entheogenic experiences including intense visual hallucinations, euphoria, even true hallucinations (perceived extensions of reality). A trip sitter is recommended to assist the drug user in staying physically and mentally healthy, and, in the case of smoked DMT, to catch the pipe if the user loses awareness of it. DMT is classified in the United States as a Schedule I drug. There are no drug tests that would show DMT usage. None of the basic NIDA 5 drug tests or any extended drug test will show a result for DMT. Dimethyltryptamine (DMT), also known as N,N-dimethyltryptamine, is a psychedelic tryptamine. It is not to be confused with 5-MeO-DMT and is similar in chemical structure to the neurotransmitter serotonin. DMT is created in small amounts by the human body during normal metabolism by the enzyme tryptamine-N-methyltransferase. Pure DMT at room temperature is a clear or white crystalline solid. DMT was first chemically synthesized in 1931. It also occurs naturally in many species of plants. DMT-containing plants are used in several South American shamanic practices. It is one of the main active constituents of snuffs like yopo and of the drink ayahuasca. Oral ingestion: DMT, which is broken down by the digestive enzyme monoamine oxidase, is practically inactive if taken orally, unless combined with a monoamine oxidase inhibitor (MAOI). The traditional South American ayahuasca, or yage, is a tea mixture containing DMT and a MAOI. There are a number of admixtures to this brew, but most commonly it is simply the leaves of Psychotria viridis (containing DMT), and the vine Banisteriopsis caapi (the source of MAOI). Other DMT containing plants, including Diplopterys cabrerana, are sometimes used in ayahuasca in different areas of South America. Two common sources in the western US are Reed canary grass (Phalaris arundinacea) and Harding grass (Phalaris aquatica). These invasive grasses contain low levels of DMT and other alkaloids. Taken orally with an appropriate MAOI, DMT produces a long lasting (over 3 hour), slow, but deep spiritual experience. MAOIs should be used with extreme caution as they can have lethal complications with some prescription drugs, such as SSRI antidepressants, and some over-the-counter drugs. Smoked: If DMT is smoked, the maximal effects last for a short period of time (5-30 minutes dose dependent). The onset after inhalation is very fast (less than 45 seconds) and maximal effects are reached within about a minute. The Business Mans lunch trip is a common name due to the relatively short duration of vaporized, insufflated, or injected DMT. D018377 - Neurotransmitter Agents > D018490 - Serotonin Agents > D017366 - Serotonin Receptor Agonists D018377 - Neurotransmitter Agents > D018490 - Serotonin Agents > D012702 - Serotonin Antagonists D002491 - Central Nervous System Agents > D011619 - Psychotropic Drugs > D006213 - Hallucinogens
Psilocin
Psilocin (4-OH-DMT), an aromatic compound, sometimes also spelled psilocine, psilocyn, or psilotsin, is a psychedelic mushroom alkaloid. It is found in most psychedelic mushrooms together with its phosphorylated counterpart psilocybin. Psilocin is a Schedule I drug under the Convention on Psychotropic Substances. The mind-altering effects of psilocin are highly variable and subjective, but resemble those caused by LSD and mescaline. The effects typically last anywhere from three to eight hours depending on certain variables (such as metabolism, food interaction); however the effects can seem to last much longer due to psilocins ability to distort the perception of time. Sulfur analogs are known with a benzothienyl replacement as well as 4-SH-DMT. N1-methylpsilocin is a functionally 5-HT2C receptor preferring agonists. 4-fluoro-N,N-dimethyltryptamine is known. O-Acetylpsilocin is an acetylized analog of psilocin, also known as 4-AcO-DMT. Additionally, substitution of a methyl group at the dimethylated nitrogen with an isopropyl or ethyl group yields 4-HO-MIPT (4-Hydroxy-N-Methyl-N-Isopropyltryptamine) and 4-HO-MET (4-Hydroxy-N-Methyl-N-Ethyltryptamine), respectively. D002491 - Central Nervous System Agents > D011619 - Psychotropic Drugs > D006213 - Hallucinogens
Psilocybine
D002491 - Central Nervous System Agents > D011619 - Psychotropic Drugs > D006213 - Hallucinogens COVID info from clinicaltrial, clinicaltrials, clinical trial, clinical trials C78272 - Agent Affecting Nervous System > C47794 - Serotonin Agonist Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS
Tryptophanamide
Tryptophanamide is a substrate for tryptophan aminopeptidase (EC: 3.5.1.57)and is converted to L-Tryptophan via enzymatic hydrolysis. [HMDB] Tryptophanamide is a substrate for tryptophan aminopeptidase (EC: 3.5.1.57)and is converted to L-Tryptophan via enzymatic hydrolysis. KEIO_ID T054; [MS3] KO009291 KEIO_ID T054; [MS2] KO009290 KEIO_ID T054
Zolmitriptan
Zolmitriptan is only found in individuals that have used or taken this drug. It is a synthetic tryptamine derivative and appears as a white powder that is readily soluble in water. [Wikipedia]Zolmitriptan binds with high affinity to human 5-HT1B and 5-HT1D receptors leading to cranial blood vessel constriction. Current theories proposed to explain the etiology of migraine headache suggest that symptoms are due to local cranial vasodilatation and/or to the release of sensory neuropeptides (vasoactive intestinal peptide, substance P and calcitonin gene-related peptide) through nerve endings in the trigeminal system. The therapeutic activity of zolmitriptan for the treatment of migraine headache can most likely be attributed to the agonist effects at the 5HT1B/1D receptors on intracranial blood vessels (including the arterio-venous anastomoses) and sensory nerves of the trigeminal system which result in cranial vessel constriction and inhibition of pro-inflammatory neuropeptide release. N - Nervous system > N02 - Analgesics > N02C - Antimigraine preparations > N02CC - Selective serotonin (5ht1) agonists D018377 - Neurotransmitter Agents > D018490 - Serotonin Agents > D017366 - Serotonin Receptor Agonists C78272 - Agent Affecting Nervous System > C47794 - Serotonin Agonist D000890 - Anti-Infective Agents > D023303 - Oxazolidinones
5-Methoxydimethyltryptamine
5-Methoxydimethyltryptamine, like all methoxydimethyltryptamines is a compound that contain the biogenic monoamine tryptamine and is substituted with one methoxy group and two methyl groups. Members of this group include several potent serotonergic hallucinogens found in several unrelated plants, skins of certain toads, and in mammalian brains. They are possibly involved in the etiology of schizophrenia. They are formed as metabolites of serotonin (5-hydroxytryptamine) or tryptamine by the enzyme indolethylamine N-methyltransferase (INMT). The physiological significance of the N-methylating pathway of indoleamine metabolism, and of the methylated end products, is unknown. Because of the known psychotropic properties of the dimethylated amines, their possible involvement in the chemical pathogenesis of mental disorders has received wide interest. The hallucinogenic actions of the methylated indoleamines, like those of LSD, are believed to be mediated through the 5HT2 receptor. (PMID 11763413). 5-Methoxydimethyltryptamine, like all Methoxydimethyltryptamines is a compound that contain the biogenic monoamine tryptamine and is substituted with one methoxy group and two methyl groups. Members of this group include several potent serotonergic hallucinogens found in several unrelated plants, skins of certain toads, and in mammalian brains. They are possibly involved in the etiology of schizophrenia. (PubChem) C78272 - Agent Affecting Nervous System > C47794 - Serotonin Agonist KEIO_ID M103; [MS2] KO009040 KEIO_ID M103
Rizatriptan
Rizatriptan is only found in individuals that have used or taken this drug. It is a triptan drug used for the treatment of migraine headaches. It is a selective 5-hydroxytryptamine1 receptor subtype agonist.Three distinct pharmacological actions have been implicated in the antimigraine effect of the triptans: (1) stimulation of presynaptic 5-HT1D receptors, which serves to inhibit both dural vasodilation and inflammation; (2) direct inhibition of trigeminal nuclei cell excitability via 5-HT1B/1D receptor agonism in the brainstem and (3) vasoconstriction of meningeal, dural, cerebral or pial vessels as a result of vascular 5-HT1B receptor agonism. N - Nervous system > N02 - Analgesics > N02C - Antimigraine preparations > N02CC - Selective serotonin (5ht1) agonists D018377 - Neurotransmitter Agents > D018490 - Serotonin Agents > D017366 - Serotonin Receptor Agonists C78272 - Agent Affecting Nervous System > C47794 - Serotonin Agonist
Almotriptan
Almotriptan is a triptan drug for the treatment of migraine headaches. Almotriptan is in a class of medications called selective serotonin receptor agonists. It works by narrowing blood vessels in the brain, stopping pain signals from being sent to the brain, and stopping the release of certain natural substances that cause pain, nausea, and other symptoms of migraine. Almotriptan does not prevent migraine attacks. N - Nervous system > N02 - Analgesics > N02C - Antimigraine preparations > N02CC - Selective serotonin (5ht1) agonists D018377 - Neurotransmitter Agents > D018490 - Serotonin Agents > D017366 - Serotonin Receptor Agonists C78272 - Agent Affecting Nervous System > C47794 - Serotonin Agonist Almotriptan is a selective agonist of 5-HT 1B/1D Receptor. Almotriptan can used in study of migraine attacks[1].
N-Methyl-1H-indole-3-propanamide
N-Methyl-1H-indole-3-propanamide is found in mushrooms. N-Methyl-1H-indole-3-propanamide is produced by Omphalotus olearius (common chanterelle). Production by Omphalotus olearius (common chanterelle). N-Methyl-1H-indole-3-propanamide is found in mushrooms.
N-(1-Deoxy-1-fructosyl)tryptophan
Fructose aminoacids are naturally occurring compounds derived from D-fructose and L-aminoacids. They are amadori products resulting from sugar-aminoacid interactions in food products, especially cooked foods [CCD] N-(1-Deoxy-1-fructosyl)tryptophan is classified as a Natural Food Constituent (code WA) in the DFC.
N-Monodesmethyl-rizatriptan
N-Monodesmethyl-rizatriptan is a metabolite of rizatriptan. Rizatriptan (Maxalt) is a 5-HT1 agonist triptan drug developed by Merck & Co. for the treatment of migraine headaches. It is available in strengths of 5 and 10 mg as tablets and orally disintegrating tablets (Maxalt-MLT). Maxalt obtained approval by the United States Food and Drug Administration (FDA) on June 29, 1998. It is a second-generation triptan. Rizatriptan is available only by prescription in Australia, the United States, Canada and New Zealand. (Wikipedia)
norzolmitripan
norzolmitripan is a metabolite of zolmitriptan. Zolmitriptan is a selective serotonin receptor agonist of the 1B and 1D subtypes. It is a triptan, used in the acute treatment of migraine attacks with or without aura and cluster headaches. Zolmitriptan is marketed by AstraZeneca with the brand names Zomig, Zomigon (Argentina, Canada & Greece), AscoTop (Germany) and Zomigoro (France). In 2008, Zomig generated nearly $154 million in sales. (Wikipedia)
N-desmethylalmotriptan
N-desmethylalmotriptan is a metabolite of almotriptan. Almotriptan, is a triptan drug discovered and developed by Almirall for the treatment of heavy migraine headache. It is available in 12.5 mg in most countries and also 6.25 mg in US and Canada. (Wikipedia)
Indolepropionamide
Indolepropionamide (IPAM) is a product of tryptophan metabolism formed by symbiotic bacteria in the gastrointestinal tract of mammals. In particular, IPAM is an amide derivatization product of indole-3-propionic acid (IPA). IPAM reduces reactive oxygen species by inhibiting oxidative phosphorylation in complex I of the electron transport chain and acts as a stabilizer of energy metabolism, thereby reducing reactive oxygen species (ROS) production. In contrast to indole-3-propionic acid which bears a polar carboxyl group that is ionized at physiological pH carrying a negative charge, IPAM is non-polar and has sufficient lipophilicity to penetrate through biological membranes. In contrast to melatonin, IPAM is a "reversed amide" lacking the methoxy group as an aromatic substituent. In contrast to IPAM, melatonin is quickly metabolized in the liver by hydroxylation and excreted as the glucuronide or sulfate conjugate of 6-hydroxymelatonin (a pro-oxidant metabolite). IPAM, however, has a long half-life and no pro-oxidant activity (PMID: 20421998).
4-[[(1R)-2-[[(2R)-2-(2-Adamantyloxycarbonylamino)-3-(1H-indol-3-yl)-2-methylpropanoyl]amino]-1-phenylethyl]amino]-4-oxobutanoic acid
(4R)-4-[[3-(2-Dimethylaminoethyl)-1H-indol-5-yl]methyl]oxazolidin-2-one
5-Methoxy-N,N-diisopropyltryptamine
5-Carboxamidotryptamine
D018377 - Neurotransmitter Agents > D018490 - Serotonin Agents > D017366 - Serotonin Receptor Agonists
N-Hydroxy-3-[4-[[2-(2-methyl-1H-indol-3-yl)ethylamino]methyl]phenyl]-2-propenamide
Avitriptan
C78272 - Agent Affecting Nervous System > C29710 - Antipsychotic Agent C78272 - Agent Affecting Nervous System > C47794 - Serotonin Agonist
5-Fluoro-3-[3-[4-(5-methoxypyrimidin-4-yl)piperazin-1-yl]propyl]-1H-indole
3-Cyclobutene-1,2-dione, 3-((3-(3-(4-(5-methoxy-4-pyrimidinyl)-1-piperazinyl)propyl)-1H-indol-5-yl)amino)-4-methyl-
Dacinostat
Idalopirdine
D018377 - Neurotransmitter Agents > D018490 - Serotonin Agents > D012702 - Serotonin Antagonists C78272 - Agent Affecting Nervous System > C66885 - Serotonin Antagonist
Baratol
C - Cardiovascular system > C02 - Antihypertensives > C02C - Antiadrenergic agents, peripherally acting > C02CA - Alpha-adrenoreceptor antagonists C78272 - Agent Affecting Nervous System > C29747 - Adrenergic Agent > C72900 - Adrenergic Antagonist D018377 - Neurotransmitter Agents > D018663 - Adrenergic Agents > D018674 - Adrenergic Antagonists D002317 - Cardiovascular Agents > D000959 - Antihypertensive Agents Indoramin is an orally active antihypertensive agent. Indoramin is also selective for the α1A-adrenoceptor[1].
LY303870;LY-303870;LY 303870
D018377 - Neurotransmitter Agents > D064729 - Neurokinin-1 Receptor Antagonists
