Classification Term: 3510
Benzylethers (ontology term: CHEMONTID:0002542)
found 29 associated metabolites at sub_class
metabolite taxonomy ontology rank level.
Ancestor: Benzene and substituted derivatives
Child Taxonomies: There is no child term of current ontology term.
Enilconazole
Imazalil is a slightly yellow to brown solidified oil. Non-corrosive. Used as a fungicide. 1-[2-(allyloxy)-2-(2,4-dichlorophenyl)ethyl]imidazole is a member of the class of imidazoles in which the hydrogen at position 1 is replaced by a 2-(allyloxy)-2-(2,4-dichlorophenyl)ethyl group. It is a member of imidazoles, an ether and a dichlorobenzene. Enilconazole is a natural product found in Ganoderma lucidum with data available. Enilconazole (synonyms imazalil, chloramizole) is a fungicide widely used in agriculture, particularly in the growing of citrus fruits. Trade names include Freshgard, Fungaflor, and Nuzone. Enilconazole is an Agricultural fungicide Enilconazole is a fungicide widely used in agriculture, particularly in the growing of citrus fruits. It is also called Imazalil, Chloramizole, Freshgard, Fungaflor, and Nuzone C254 - Anti-Infective Agent > C514 - Antifungal Agent D016573 - Agrochemicals D010575 - Pesticides CONFIDENCE standard compound; INTERNAL_ID 924; DATASET 20200303_ENTACT_RP_MIX501; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 7952; ORIGINAL_PRECURSOR_SCAN_NO 7950 CONFIDENCE standard compound; INTERNAL_ID 924; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 8037; ORIGINAL_PRECURSOR_SCAN_NO 8036 CONFIDENCE standard compound; INTERNAL_ID 924; DATASET 20200303_ENTACT_RP_MIX501; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 7940; ORIGINAL_PRECURSOR_SCAN_NO 7936 CONFIDENCE standard compound; INTERNAL_ID 924; DATASET 20200303_ENTACT_RP_MIX501; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 7963; ORIGINAL_PRECURSOR_SCAN_NO 7962 CONFIDENCE standard compound; INTERNAL_ID 924; DATASET 20200303_ENTACT_RP_MIX501; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 7958; ORIGINAL_PRECURSOR_SCAN_NO 7957 CONFIDENCE standard compound; INTERNAL_ID 924; DATASET 20200303_ENTACT_RP_MIX501; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 7890; ORIGINAL_PRECURSOR_SCAN_NO 7888 CONFIDENCE standard compound; INTERNAL_ID 8782 CONFIDENCE standard compound; INTERNAL_ID 2858 CONFIDENCE standard compound; INTERNAL_ID 4009 Imazalil (Enilconazole) is a fungicide, widely used in agriculture, particularly in the growing of citrus fruits, also used in veterinary medicine as a topical antimycotic.
Bisoprolol
Bisoprolol is a cardioselective β1-adrenergic blocking agent used for secondary prevention of myocardial infarction (MI), heart failure, angina pectoris and mild to moderate hypertension. Bisoprolol is structurally similar to metoprolol, acebutolol and atenolol in that it has two substituents in the para position of the benzene ring. The β1-selectivity of these agents is thought to be due in part to the large substituents in the para position. At lower doses (less than 20 mg daily), bisoprolol selectively blocks cardiac β1-adrenergic receptors with little activity against β2-adrenergic receptors of the lungs and vascular smooth muscle. Receptor selectivity decreases with daily doses of 20 mg or greater. Unlike propranolol and pindolol, bisoprolol does not exhibit membrane-stabilizing or sympathomimetic activity. Bisoprolol possesses a single chiral centre and is administered as a racemic mixture. Only l-bisoprolol exhibits significant β-blocking activity. C - Cardiovascular system > C07 - Beta blocking agents > C07A - Beta blocking agents > C07AB - Beta blocking agents, selective C78272 - Agent Affecting Nervous System > C29747 - Adrenergic Agent > C72900 - Adrenergic Antagonist D018373 - Peripheral Nervous System Agents > D001337 - Autonomic Agents > D013565 - Sympatholytics D018377 - Neurotransmitter Agents > D018663 - Adrenergic Agents > D018674 - Adrenergic Antagonists D002317 - Cardiovascular Agents > D000959 - Antihypertensive Agents CONFIDENCE standard compound; EAWAG_UCHEM_ID 3013 CONFIDENCE standard compound; INTERNAL_ID 8595 CONFIDENCE standard compound; INTERNAL_ID 2677
Carbinoxamine
Carbinoxamine, also known as carbinoxamine maleate or clistin, is a member of the class of compounds known as benzylethers. Benzylethers are aromatic ethers with the general formula ROCR (R = alkyl, aryl; R=benzene). Carbinoxamine is practically insoluble (in water) and a very strong basic compound (based on its pKa). Carbinoxamine can be found in barley and garden onion, which makes carbinoxamine a potential biomarker for the consumption of these food products. Carbinoxamine can be found primarily in blood and urine. In humans, carbinoxamine is involved in the carbinoxamine h1-antihistamine action. Carbinoxamine is a non-carcinogenic (not listed by IARC) potentially toxic compound. Carbinoxamine is a drug which is used for symptomatic relief of seasonal and perennial allergic rhinitis and vasomotor rhinitis, as well as allergic conjunctivitis caused by foods and inhaled allergens. also for the relief of allergic reactions to blood or plasma, and the symptomatic management of mild, uncomplicated allergic skin manifestations of urticaria and angioedema. Carbinoxamine (Clistin, Palgic, Rondec, Rhinopront) is a antihistamine and anticholinergic agent. It was first launched in the United States by the McNeil Corporation under the brand name Clistin. It is now available under the brand name Palgic as 4 mg tablets or 4 mg/5 mL liquid. It is approved by the U.S. Food and Drug Administration (FDA) (specifically at the 4 mg dose/strength) for hay fever (a.k.a. allergic rhinitis, SAR and PAR); vasomotor rhinitis; mild urticaria; angioedema, dermatographism and allergic conjunctivitis. Carbinoxamine is a histamine antagonist, specifically an H1-antagonist. The maleic acid salt of the levorotatory isomer is sold as the prescription drug rotoxamine . Carbinoxamine competes with free histamine for binding at HA-receptor sites. This antagonizes the effects of histamine on HA-receptors, leading to a reduction of the negative symptoms brought on by histamine HA-receptor binding. Carbinoxamines anticholinergic action appears to be due to a central antimuscarinic effect, which also may be responsible for its antiemetic effects, although the exact mechanism is unknown (DrugBank). Carbinoxamine competes with free histamine for binding at HA-receptor sites. This antagonizes the effects of histamine on HA-receptors, leading to a reduction of the negative symptoms brought on by histamine HA-receptor binding. Carbinoxamines anticholinergic action appears to be due to a central antimuscarinic effect, which also may be responsible for its antiemetic effects, although the exact mechanism is unknown (T3DB). Carbinoxamine is a first generation antihistamine that competes with free histamine for binding at HA-receptor sites. This antagonizes the effects of histamine on HA-receptors, leading to a reduction of the negative symptoms brought on by histamine HA-receptor binding. The product label for carbinoxamine as an over the counter cough and cold medicine is being modified to state do not use in children under 4 years of age in order to prevent and reduce misuse, as many unapproved carbinoxamine-containing preparations contained inappropriate labeling, which promoted unapproved uses (including management of congestion, cough, the common cold, and the use in children under 2 years of age), which can potentially cause serious health risks. R - Respiratory system > R06 - Antihistamines for systemic use > R06A - Antihistamines for systemic use > R06AA - Aminoalkyl ethers D018377 - Neurotransmitter Agents > D018494 - Histamine Agents > D006633 - Histamine Antagonists C308 - Immunotherapeutic Agent > C29578 - Histamine-1 Receptor Antagonist
Tioconazole
Tioconazole is an antifungal medication of the Imidazole class used to treat infections caused by a fungus or yeast. Tioconazole topical (skin) preparations are also available for ringworm, jock itch, athletes foot, and tinea versicolor or sun fungus. Tioconazole interacts with 14-alpha demethylase, a cytochrome P-450 enzyme that converts lanosterol to ergosterol, an essential component of the yeast membrane. In this way, tioconazole inhibits ergosterol synthesis, resulting in increased cellular permeability. G - Genito urinary system and sex hormones > G01 - Gynecological antiinfectives and antiseptics > G01A - Antiinfectives and antiseptics, excl. combinations with corticosteroids > G01AF - Imidazole derivatives D - Dermatologicals > D01 - Antifungals for dermatological use > D01A - Antifungals for topical use > D01AC - Imidazole and triazole derivatives D006730 - Hormones, Hormone Substitutes, and Hormone Antagonists > D006727 - Hormone Antagonists > D065088 - Steroid Synthesis Inhibitors D004791 - Enzyme Inhibitors > D065088 - Steroid Synthesis Inhibitors > D058888 - 14-alpha Demethylase Inhibitors D004791 - Enzyme Inhibitors > D065607 - Cytochrome P-450 Enzyme Inhibitors D000890 - Anti-Infective Agents > D000935 - Antifungal Agents C254 - Anti-Infective Agent > C514 - Antifungal Agent KEIO_ID T123; [MS2] KO009265 KEIO_ID T123
Econazole
Econazole is only found in individuals that have used or taken this drug. It is a broad spectrum antimycotic with some action against Gram positive bacteria. It is used topically in dermatomycoses also orally and parenterally. [PubChem]Econazole interacts with 14-alpha demethylase, a cytochrome P-450 enzyme necessary to convert lanosterol to ergosterol. As ergosterol is an essential component of the fungal cell membrane, inhibition of its synthesis results in increased cellular permeability causing leakage of cellular contents. Econazole may also inhibit endogenous respiration, interact with membrane phospholipids, inhibit the transformation of yeasts to mycelial forms, inhibit purine uptake, and impair triglyceride and/or phospholipid biosynthesis. CONFIDENCE standard compound; INTERNAL_ID 646; DATASET 20200303_ENTACT_RP_MIX506; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 8761; ORIGINAL_PRECURSOR_SCAN_NO 8759 CONFIDENCE standard compound; INTERNAL_ID 646; DATASET 20200303_ENTACT_RP_MIX506; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 8812; ORIGINAL_PRECURSOR_SCAN_NO 8810 CONFIDENCE standard compound; INTERNAL_ID 646; DATASET 20200303_ENTACT_RP_MIX506; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 8821; ORIGINAL_PRECURSOR_SCAN_NO 8819 CONFIDENCE standard compound; INTERNAL_ID 646; DATASET 20200303_ENTACT_RP_MIX506; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 8721; ORIGINAL_PRECURSOR_SCAN_NO 8717 CONFIDENCE standard compound; INTERNAL_ID 646; DATASET 20200303_ENTACT_RP_MIX506; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 8770; ORIGINAL_PRECURSOR_SCAN_NO 8769 CONFIDENCE standard compound; INTERNAL_ID 646; DATASET 20200303_ENTACT_RP_MIX506; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 8808; ORIGINAL_PRECURSOR_SCAN_NO 8805 G - Genito urinary system and sex hormones > G01 - Gynecological antiinfectives and antiseptics > G01A - Antiinfectives and antiseptics, excl. combinations with corticosteroids > G01AF - Imidazole derivatives D - Dermatologicals > D01 - Antifungals for dermatological use > D01A - Antifungals for topical use > D01AC - Imidazole and triazole derivatives D006730 - Hormones, Hormone Substitutes, and Hormone Antagonists > D006727 - Hormone Antagonists > D065088 - Steroid Synthesis Inhibitors D004791 - Enzyme Inhibitors > D065088 - Steroid Synthesis Inhibitors > D058888 - 14-alpha Demethylase Inhibitors D004791 - Enzyme Inhibitors > D065607 - Cytochrome P-450 Enzyme Inhibitors D000890 - Anti-Infective Agents > D000935 - Antifungal Agents C254 - Anti-Infective Agent > C514 - Antifungal Agent
Miconazole
Miconazole is only found in individuals that have used or taken this drug. It is an imidazole antifungal agent that is used topically and by intravenous infusion. [PubChem]Miconazole interacts with 14-α demethylase, a cytochrome P-450 enzyme necessary to convert lanosterol to ergosterol. As ergosterol is an essential component of the fungal cell membrane, inhibition of its synthesis results in increased cellular permeability causing leakage of cellular contents. Miconazole may also inhibit endogenous respiration, interact with membrane phospholipids, inhibit the transformation of yeasts to mycelial forms, inhibit purine uptake, and impair triglyceride and/or phospholipid biosynthesis. G - Genito urinary system and sex hormones > G01 - Gynecological antiinfectives and antiseptics > G01A - Antiinfectives and antiseptics, excl. combinations with corticosteroids > G01AF - Imidazole derivatives A - Alimentary tract and metabolism > A07 - Antidiarrheals, intestinal antiinflammatory/antiinfective agents > A07A - Intestinal antiinfectives > A07AC - Imidazole derivatives A - Alimentary tract and metabolism > A01 - Stomatological preparations > A01A - Stomatological preparations > A01AB - Antiinfectives and antiseptics for local oral treatment D - Dermatologicals > D01 - Antifungals for dermatological use > D01A - Antifungals for topical use > D01AC - Imidazole and triazole derivatives J - Antiinfectives for systemic use > J02 - Antimycotics for systemic use > J02A - Antimycotics for systemic use > J02AB - Imidazole derivatives D006730 - Hormones, Hormone Substitutes, and Hormone Antagonists > D006727 - Hormone Antagonists > D065088 - Steroid Synthesis Inhibitors D004791 - Enzyme Inhibitors > D065607 - Cytochrome P-450 Enzyme Inhibitors > D065688 - Cytochrome P-450 CYP2C9 Inhibitors D004791 - Enzyme Inhibitors > D065607 - Cytochrome P-450 Enzyme Inhibitors > D065692 - Cytochrome P-450 CYP3A Inhibitors D004791 - Enzyme Inhibitors > D065088 - Steroid Synthesis Inhibitors > D058888 - 14-alpha Demethylase Inhibitors S - Sensory organs > S02 - Otologicals > S02A - Antiinfectives > S02AA - Antiinfectives D000890 - Anti-Infective Agents > D000935 - Antifungal Agents C254 - Anti-Infective Agent > C514 - Antifungal Agent
Doxylamine
Doxylamine is a sedating antihistamine that can be used by itself as a short-term sleep aid, in combination with other drugs as a night-time cold and allergy relief. It is a member of the ethanolamine class of antihistamines and has anti-allergy power superior to almost every other antihistamine on the market, with the exception of diphenhydramine (Benadryl). It is also the most effective over-the-counter sedative available in North America, and more sedating than some prescription hypnotics. In a study, it was found that doxylamine succinate is possibly more effective than the barbiturate, phenobarbital for use as a sedative. For this reason, doxylamine has sometimes been used off label in a manner similar to diphenhydramine for the reduction of anxiety symptoms; Doxylamine succinate is used by itself as a short-term sleep aid, in combination with other drugs as a night-time cold and allergy relief drug, and a preparation is prescribed in combination with Vitamin B6 (pyridoxine) to prevent morning sickness in pregnant women. In Commonwealth countries, doxylamine is available prepared with paracetamol/acetaminophen and codeine under the brand name Syndol or Mersyndol, as treatment for tension headache and other types of pain, or as a general OTC sleep-aid branded as Somnil, Donormyl, DSozile and Restavit containing Doxylamine Succinate only. [HMDB] Doxylamine is a sedating antihistamine that can be used by itself as a short-term sleep aid, in combination with other drugs as a night-time cold and allergy relief. It is a member of the ethanolamine class of antihistamines and has anti-allergy power superior to almost every other antihistamine on the market, with the exception of diphenhydramine (Benadryl). It is also the most effective over-the-counter sedative available in North America, and more sedating than some prescription hypnotics. In a study, it was found that doxylamine succinate is possibly more effective than the barbiturate, phenobarbital for use as a sedative. For this reason, doxylamine has sometimes been used off label in a manner similar to diphenhydramine for the reduction of anxiety symptoms; Doxylamine succinate is used by itself as a short-term sleep aid, in combination with other drugs as a night-time cold and allergy relief drug, and a preparation is prescribed in combination with Vitamin B6 (pyridoxine) to prevent morning sickness in pregnant women. In Commonwealth countries, doxylamine is available prepared with paracetamol/acetaminophen and codeine under the brand name Syndol or Mersyndol, as treatment for tension headache and other types of pain, or as a general OTC sleep-aid branded as Somnil, Donormyl, DSozile and Restavit containing Doxylamine Succinate only. R - Respiratory system > R06 - Antihistamines for systemic use > R06A - Antihistamines for systemic use > R06AA - Aminoalkyl ethers D018377 - Neurotransmitter Agents > D018494 - Histamine Agents > D006633 - Histamine Antagonists C308 - Immunotherapeutic Agent > C29578 - Histamine-1 Receptor Antagonist D018373 - Peripheral Nervous System Agents > D001337 - Autonomic Agents D005765 - Gastrointestinal Agents > D000932 - Antiemetics D002491 - Central Nervous System Agents
4-(Ethoxymethyl)phenol
4-(Ethoxymethyl)phenol is a constituent of Vanilla fragrans (vanilla). Constituent of Vanilla fragrans (vanilla)
(3beta,4alpha,5alpha,23E)-4-Methylergosta-7,23-dien-3-ol
(3beta,4alpha,5alpha,23E)-4-Methylergosta-7,23-dien-3-ol is found in cereals and cereal products. (3beta,4alpha,5alpha,23E)-4-Methylergosta-7,23-dien-3-ol is a constituent of Zea mays (sweet corn) germ oil.
4-(Butoxymethyl)phenol
4-(Butoxymethyl)phenol is a constituent of the leaves and stems of Vanilla fragrans (vanilla). Constituent of the leaves and stems of Vanilla fragrans (vanilla)
beta-O-Methylynephrine
beta-O-Methylynephrine is found in citrus. beta-O-Methylynephrine is obtained from tangerine leaves, poss. as artifact. obtained from tangerine leaves, poss. as artifact. beta-O-Methylynephrine is found in citrus.
Bepotastine
Bepotastine is a non-sedating, selective antagonist of the histamine 1 (H1) receptor. Bepotastine was approved in Japan for use in the treatment of allergic rhinitis and uriticaria/puritus in July 2000 and January 2002, respectively, and is marketed by Tanabe Seiyaku Co., Ltd. under the brand name Talion®. It is currently undergoing trials in the U.S.
Benzyl butyl ether
Benzyl butyl ether is found in mushrooms. Benzyl butyl ether is a constituent of the aroma of roasted cashew and some edible mushrooms. Benzyl butyl ether is a flavouring agent Constituent of the aroma of roasted cashew and some edible mushrooms. Flavouring agent. Benzyl butyl ether is found in mushrooms and nuts.
Benzyl ethyl ether
Benzyl ethyl ether is found in cocoa and cocoa products. Benzyl ethyl ether is present in cocoa. Benzyl ethyl ether is a flavouring agent Present in cocoa. Flavouring agent. Benzyl ethyl ether is found in cocoa and cocoa products. (Ethoxymethyl)benzene is an endogenous metabolite.
Dibenzyl ether
Dibenzyl ether, also known as benzyl oxide or fema 2371, belongs to the class of organic compounds known as benzylethers. These are aromatic ethers with the general formula ROCR (R = alkyl, aryl; R=benzene). Dibenzyl ether is a sweet, almond, and cherry tasting compound. Dibenzyl ether has been detected, but not quantified, in dills. This could make dibenzyl ether a potential biomarker for the consumption of these foods. Flavouring ingredient. Dibenzyl ether is found in dill.
2-Ethoxy-4-(methoxymethyl)phenol
2-Ethoxy-4-(methoxymethyl)phenol is a fragrance ingredient with a vanilla odour. Fragrance ingredient with a vanilla odour
2-(Ethoxymethyl)phenol
2-(Ethoxymethyl)phenol is a flavouring agent. Flavouring agent
(Dimethoxymethyl)benzene
(Dimethoxymethyl)benzene, also known as benzaldehyde dimethyl acetal or alpha,alpha-dimethoxytoluene, belongs to the class of organic compounds known as benzylethers. These are aromatic ethers with the general formula ROCR (R = alkyl, aryl; R=benzene)(Dimethoxymethyl)benzene is an almond, floral, and fruity tasting compound. (Dimethoxymethyl)benzene has been detected, but not quantified, in green vegetables and potato. This could make (dimethoxymethyl)benzene a potential biomarker for the consumption of these foods. Constituent of rhubarb and potato. It is used in perfumery and food flavouring. (Dimethoxymethyl)benzene is found in green vegetables and potato.
(6S)-6,7-Dihydro-2-nitro-6-[[4-(trifluoromethoxy)phenyl]methoxy]-5H-imidazo[2,1-b][1,3]oxazine
1-(2,3-Bis((4-methoxyphenyl)methoxy)propyl)-1H-imidazole
Isoconazole
G - Genito urinary system and sex hormones > G01 - Gynecological antiinfectives and antiseptics > G01A - Antiinfectives and antiseptics, excl. combinations with corticosteroids > G01AF - Imidazole derivatives D - Dermatologicals > D01 - Antifungals for dermatological use > D01A - Antifungals for topical use > D01AC - Imidazole and triazole derivatives D000890 - Anti-Infective Agents > D000935 - Antifungal Agents C254 - Anti-Infective Agent > C514 - Antifungal Agent
Pentafluorobenzyl ether
Rivenprost
VIBEGRON
Vilanterol
Zipeprol
R - Respiratory system > R05 - Cough and cold preparations > R05D - Cough suppressants, excl. combinations with expectorants C78273 - Agent Affecting Respiratory System > C66917 - Antitussive Agent D019141 - Respiratory System Agents > D000996 - Antitussive Agents D002491 - Central Nervous System Agents
Methoxyphenylacetic acid
Methoxyphenylacetic acid is a member of the class of compounds known as benzylethers. Benzylethers are aromatic ethers with the general formula ROCR (R = alkyl, aryl; R=benzene). Methoxyphenylacetic acid is soluble (in water) and a weakly acidic compound (based on its pKa). Methoxyphenylacetic acid can be found in olive, which makes methoxyphenylacetic acid a potential biomarker for the consumption of this food product. 2-(4-Methoxyphenyl)acetic acid is a plasma metabolite, with high sensitivity and specificity value as a biomarker for discriminating between NSCLC and healthy controls. 2-(4-Methoxyphenyl)acetic acid is a plasma metabolite, with high sensitivity and specificity value as a biomarker for discriminating between NSCLC and healthy controls.