NCBI Taxonomy: 2804
Polysiphonia (ncbi_taxid: 2804)
found 88 associated metabolites at genus taxonomy rank level.
Ancestor: Polysiphonioideae
Child Taxonomies: Polysiphonia boldii, Polysiphonia urceolata, Polysiphonia teges, Polysiphonia nigra, Polysiphonia forfex, Polysiphonia homoia, Polysiphonia villum, Polysiphonia urbana, Polysiphonia fibrata, Polysiphonia simplex, Polysiphonia anomala, Polysiphonia binneyi, Polysiphonia hendryi, Polysiphonia koreana, Polysiphonia blandii, Polysiphonia stricta, Polysiphonia radiata, Polysiphonia echinata, Polysiphonia denudata, Polysiphonia elongata, Polysiphonia delicata, Polysiphonia bajacali, Polysiphonia fucoides, Polysiphonia adamsiae, Polysiphonia morrowii, Polysiphonia pacifica, Polysiphonia polyspora, Polysiphonia muninsula, Polysiphonia donghaeya, Polysiphonia pentamera, Polysiphonia pernacola, Polysiphonia atlantica, Polysiphonia sabulosia, Polysiphonia infestans, Polysiphonia hancockii, Polysiphonia sukatarii, Polysiphonia scopulorum, Polysiphonia paniculosa, Polysiphonia constricta, Polysiphonia macrocarpa, Polysiphonia johnstonii, Polysiphonia dokdoensis, Polysiphonia furcellata, Polysiphonia subulifera, Polysiphonia delicatula, Polysiphonia caespitosa, Polysiphonia devoniensis, Polysiphonia nathanielii, Polysiphonia muelleriana, Polysiphonia flexicaulis, Polysiphonia senticulosa, Polysiphonia freshwateri, Polysiphonia namibiensis, Polysiphonia akkeshiensis, Polysiphonia foetidissima, Polysiphonia ulleungensis, unclassified Polysiphonia, Polysiphonia rhododactyla, Polysiphonia pseudovillum, Polysiphonia subtilissima, Polysiphonia cf. savatieri, Polysiphonia hemisphaerica, Polysiphonia ceramiiformis, Polysiphonia sertularioides, Polysiphonia cf. minutissima, Polysiphonia breviarticulata, Polysiphonia sertularioides-1, Polysiphonia sertularioides-2, Polysiphonia sertularioides-3, Polysiphonia havanensis sensu Borgesen
Vanillin
Vanillin, also known as vanillaldehyde or lioxin, belongs to the class of organic compounds known as methoxyphenols. Methoxyphenols are compounds containing a methoxy group attached to the benzene ring of a phenol moiety. It is used by the food industry as well as ethylvanillin. Vanillin exists in all living species, ranging from bacteria to humans. Vanillin is a sweet, chocolate, and creamy tasting compound. Vanillin is found, on average, in the highest concentration within a few different foods, such as corns, ryes, and sherries and in a lower concentration in beers, rums, and oats. Vanillin has also been detected, but not quantified, in several different foods, such as gooseberries, other bread, brazil nuts, shea tree, and ohelo berries. This could make vanillin a potential biomarker for the consumption of these foods. Vanillin is a potentially toxic compound. Synthetic vanillin, instead of natural Vanillin extract, is sometimes used as a flavouring agent in foods, beverages, and pharmaceuticals. Vanillin is the primary component of the extract of the Vanillin bean. Because of the scarcity and expense of natural Vanillin extract, there has long been interest in the synthetic preparation of its predominant component. Artificial Vanillin flavoring is a solution of pure vanillin, usually of synthetic origin. Today, artificial vanillin is made from either guaiacol or from lignin, a constituent of wood which is a byproduct of the paper industry. The first commercial synthesis of vanillin began with the more readily available natural compound eugenol. Vanillin appears as white or very slightly yellow needles. Vanillin is a member of the class of benzaldehydes carrying methoxy and hydroxy substituents at positions 3 and 4 respectively. It has a role as a plant metabolite, an anti-inflammatory agent, a flavouring agent, an antioxidant and an anticonvulsant. It is a member of phenols, a monomethoxybenzene and a member of benzaldehydes. Vanillin is a natural product found in Ficus erecta var. beecheyana, Pandanus utilis, and other organisms with data available. Vanillin is the primary component of the extract of the vanilla bean. Synthetic vanillin, instead of natural vanilla extract, is sometimes used as a flavouring agent in foods, beverages, and pharmaceuticals. It is used by the food industry as well as ethylvanillin.Artificial vanilla flavoring is a solution of pure vanillin, usually of synthetic origin. Because of the scarcity and expense of natural vanilla extract, there has long been interest in the synthetic preparation of its predominant component. The first commercial synthesis of vanillin began with the more readily available natural compound eugenol. Today, artificial vanillin is made from either guaiacol or from lignin, a constituent of wood which is a byproduct of the paper industry. (Wiki). Vanillin is a metabolite found in or produced by Saccharomyces cerevisiae. Constituent of vanilla (Vanilla subspecies) and many other plants, e.g. Peru balsam, clove bud oil. Widely used flavouring agent especies in cocoa products. obtained from spent wood-pulp liquors. Vanillin is found in many foods, some of which are pomes, elderberry, common cabbage, and dock. A member of the class of benzaldehydes carrying methoxy and hydroxy substituents at positions 3 and 4 respectively. D002491 - Central Nervous System Agents > D000927 - Anticonvulsants D020011 - Protective Agents > D016587 - Antimutagenic Agents D020011 - Protective Agents > D000975 - Antioxidants CONFIDENCE standard compound; ML_ID 59 Vanillin (p-Vanillin) is a single molecule extracted from vanilla beans and also a popular odor used widely in perfume, food and medicine. Vanillin (p-Vanillin) is a single molecule extracted from vanilla beans and also a popular odor used widely in perfume, food and medicine.
Parietin
Physcion is a dihydroxyanthraquinone that is 9,10-anthraquinone bearing hydroxy substituents at positions 1 and 8, a methoxy group at position 3, and a methyl group at position 6. It has been widely isolated and characterised from both terrestrial and marine sources. It has a role as an apoptosis inducer, an antineoplastic agent, a hepatoprotective agent, an anti-inflammatory agent, an antibacterial agent, an antifungal agent and a metabolite. It is functionally related to a 2-methylanthraquinone. Physcion is a natural product found in Rumex dentatus, Ageratina altissima, and other organisms with data available. See also: Reynoutria multiflora root (part of); Frangula purshiana Bark (part of). A dihydroxyanthraquinone that is 9,10-anthraquinone bearing hydroxy substituents at positions 1 and 8, a methoxy group at position 3, and a methyl group at position 6. It has been widely isolated and characterised from both terrestrial and marine sources. [Raw Data] CBA82_Physcion_pos_10eV.txt [Raw Data] CBA82_Physcion_pos_30eV.txt [Raw Data] CBA82_Physcion_pos_50eV.txt [Raw Data] CBA82_Physcion_pos_40eV.txt [Raw Data] CBA82_Physcion_pos_20eV.txt
Zeaxanthin
Zeaxanthin is a carotenoid xanthophyll and is one of the most common carotenoid found in nature. It is the pigment that gives corn, saffron, and many other plants their characteristic color. Zeaxanthin breaks down to form picrocrocin and safranal, which are responsible for the taste and aroma of saffron Carotenoids are among the most common pigments in nature and are natural lipid soluble antioxidants. Zeaxanthin is one of the two carotenoids (the other is lutein) that accumulate in the eye lens and macular region of the retina with concentrations in the macula greater than those found in plasma and other tissues. Lutein and zeaxanthin have identical chemical formulas and are isomers, but they are not stereoisomers. The main difference between them is in the location of a double bond in one of the end rings. This difference gives lutein three chiral centers whereas zeaxanthin has two. A relationship between macular pigment optical density, a marker of lutein and zeaxanthin concentration in the macula, and lens optical density, an antecedent of cataractous changes, has been suggested. The xanthophylls may act to protect the eye from ultraviolet phototoxicity via quenching reactive oxygen species and/or other mechanisms. Some observational studies have shown that generous intakes of lutein and zeaxanthin, particularly from certain xanthophyll-rich foods like spinach, broccoli and eggs, are associated with a significant reduction in the risk for cataract (up to 20\\%) and for age-related macular degeneration (up to 40\\%). While the pathophysiology of cataract and age-related macular degeneration is complex and contains both environmental and genetic components, research studies suggest dietary factors including antioxidant vitamins and xanthophylls may contribute to a reduction in the risk of these degenerative eye diseases. Further research is necessary to confirm these observations. (PMID: 11023002). Zeaxanthin has been found to be a microbial metabolite, it can be produced by Algibacter, Aquibacter, Escherichia, Flavobacterium, Formosa, Gramella, Hyunsoonleella, Kordia, Mesoflavibacter, Muricauda, Nubsella, Paracoccus, Siansivirga, Sphingomonas, Zeaxanthinibacter and yeast (https://reader.elsevier.com/reader/sd/pii/S0924224417302571?token=DE6BC6CC7DCDEA6150497AA3E375097A00F8E0C12AE03A8E420D85D1AC8855E62103143B5AE0B57E9C5828671F226801). It is a marker for the activity of Bacillus subtilis and/or Pseudomonas aeruginosa in the intestine. Higher levels are associated with higher levels of Bacillus or Pseudomonas. (PMID: 17555270; PMID: 12147474) Zeaxanthin is a carotenol. It has a role as a bacterial metabolite, a cofactor and an antioxidant. It derives from a hydride of a beta-carotene. Zeaxanthin is a most common carotenoid alcohols found in nature that is involved in the xanthophyll cycle. As a coexistent isomer of lutein, zeaxanthin is synthesized in plants and some micro-organisms. It gives the distinct yellow color to many vegetables and other plants including paprika, corn, saffron and wolfberries. Zeaxanthin is one of the two primary xanthophyll carotenoids contained within the retina of the eye and plays a predominant component in the central macula. It is available as a dietary supplement for eye health benefits and potential prevention of age-related macular degeneration. Zeaxanthin is also added as a food dye. Zeaxanthin is a natural product found in Bangia fuscopurpurea, Erythrobacter longus, and other organisms with data available. Carotenoids found in fruits and vegetables. Zeaxanthin accumulates in the MACULA LUTEA. See also: Saffron (part of); Corn (part of); Lycium barbarum fruit (part of). D020011 - Protective Agents > D000975 - Antioxidants > D002338 - Carotenoids
3,4-Dihydroxybenzaldehyde
Protocatechualdehyde, also known as rancinamycin iv or 1,2-dihydroxy-4-formylbenzene, is a member of the class of compounds known as hydroxybenzaldehydes. Hydroxybenzaldehydes are organic aromatic compounds containing a benzene ring carrying an aldehyde group and a hydroxyl group. Protocatechualdehyde is soluble (in water) and a very weakly acidic compound (based on its pKa). Protocatechualdehyde is an almond, bitter, and dry tasting compound and can be found in a number of food items such as plains prickly pear, mugwort, silver linden, and cardamom, which makes protocatechualdehyde a potential biomarker for the consumption of these food products. Protocatechualdehyde can be found primarily in urine. This molecule can be used as a precursor in the vanillin synthesis by biotransformation by cell cultures of Capsicum frutescens, a type of Chili pepper. It is also found in the mushroom Phellinus linteus . 3,4-Dihydroxybenzaldehyde, also known as protocatechuic aldehyde, is a phenolic aldehyde, a compound released from cork stoppers into wine. This molecule can be used as a precursor in vanillin synthesis via biotransformation by cell cultures of Capsicum frutescens, a type of chili pepper. It is also found in the mushroom Phellinus linteus (Wikipedia). D006401 - Hematologic Agents > D000925 - Anticoagulants Protocatechualdehyde (Catechaldehyde), a natural polyphenol compound isolated from the roots of radix Salviae Miltiorrhizae, is associated with a wide variety of biological activities and has been widely used in medicine as an antioxidant, anti-aging, an antibacterial and anti-inflammatory agent[1]. Protocatechualdehyde (Catechaldehyde), a natural polyphenol compound isolated from the roots of radix Salviae Miltiorrhizae, is associated with a wide variety of biological activities and has been widely used in medicine as an antioxidant, anti-aging, an antibacterial and anti-inflammatory agent[1].
2,4-Dibromophenol
2,4-Dibromophenol is found in crustaceans. Commonly found in molluscs and crustacean CONFIDENCE Reference Standard (Level 1); INTERNAL_ID 8006
4-Bromophenol
4-Bromophenol, also known as P-Bromohydroxybenzene, is classified as a member of the P-bromophenols. P-bromophenols are bromophenols carrying a iodine at the C4 position of the benzene ring. 4-Bromophenol is considered to be slightly soluble (in water) and acidic
2,6-Di-tert-butyl-4-methylphenol
2,6-Di-tert-butyl-4-methylphenol, also known as butylated hydroxytoluene or BHT, belongs to the class of organic compounds known as phenylpropanes. These are organic compounds containing a phenylpropane moiety. BHT is a mild, camphor, and musty tasting compound. It has been detected, but not quantified, in soft-necked garlic. This could make BHT a potential biomarker for the consumption of this food. BHT is a synthetic phenolic antioxidant (SPA). SPAs are a family of chemicals used widely in foods, polymers, and cosmetics as radical trapping agents to slow down degradation due to oxidation. Given their widespread use, human exposure is unavoidable and there is public concern regarding environmental contamination by these chemicals. BHT was detected in human urine (PMID:31265952). Antioxidant, used in cosmetics, foods and pharmaceuticals D020011 - Protective Agents > D000975 - Antioxidants C26170 - Protective Agent > C275 - Antioxidant Same as: D02413 Butylated hydroxytoluene is an antioxidant widely used in foods and in food-related products[1]. Butylated hydroxytoluene is a Ferroptosis inhibitor[2].
2-Bromophenol
2-Bromophenol is found in crustaceans. 2-Bromophenol is a flavour component of marine fish, molluscs and crustaceans. Imparts and intense shrimp-like flavou
2,6-Dibromophenol
2,6-Dibromophenol is found in crustaceans. 2,6-Dibromophenol is an important flavour component of marine fish, molluses and crustacean 2,6-Dibromophenol is an endogenous metabolite.
Cladosporin
D004791 - Enzyme Inhibitors
3,4-Dihydroxybenzaldehyde
Protocatechualdehyde, also known as rancinamycin iv or 1,2-dihydroxy-4-formylbenzene, is a member of the class of compounds known as hydroxybenzaldehydes. Hydroxybenzaldehydes are organic aromatic compounds containing a benzene ring carrying an aldehyde group and a hydroxyl group. Protocatechualdehyde is soluble (in water) and a very weakly acidic compound (based on its pKa). Protocatechualdehyde is an almond, bitter, and dry tasting compound and can be found in a number of food items such as plains prickly pear, mugwort, silver linden, and cardamom, which makes protocatechualdehyde a potential biomarker for the consumption of these food products. Protocatechualdehyde can be found primarily in urine. This molecule can be used as a precursor in the vanillin synthesis by biotransformation by cell cultures of Capsicum frutescens, a type of Chili pepper. It is also found in the mushroom Phellinus linteus . 3,4-dihydroxybenzaldehyde is a dihydroxybenzaldehyde. Also known as protocatechuic aldehyde, protocatechualdehyde is a naturally-occuring phenolic aldehyde that is found in barley, green cavendish bananas, grapevine leaves and root of the herb S. miltiorrhiza. Protocatechualdehyde possesses antiproliferative and pro-apoptotic properties against human breast cancer cells and colorectal cancer cells by reducing the expression of pro-oncogenes β-catenin and cyclin D1. 3,4-Dihydroxybenzaldehyde is a natural product found in Visnea mocanera, Amomum subulatum, and other organisms with data available. See also: Black Cohosh (part of). 3,4-Dihydroxybenzaldehyde, also known as protocatechuic aldehyde, is a phenolic aldehyde, a compound released from cork stoppers into wine. This molecule can be used as a precursor in vanillin synthesis via biotransformation by cell cultures of Capsicum frutescens, a type of chili pepper. It is also found in the mushroom Phellinus linteus (Wikipedia). D006401 - Hematologic Agents > D000925 - Anticoagulants Protocatechualdehyde (Catechaldehyde), a natural polyphenol compound isolated from the roots of radix Salviae Miltiorrhizae, is associated with a wide variety of biological activities and has been widely used in medicine as an antioxidant, anti-aging, an antibacterial and anti-inflammatory agent[1]. Protocatechualdehyde (Catechaldehyde), a natural polyphenol compound isolated from the roots of radix Salviae Miltiorrhizae, is associated with a wide variety of biological activities and has been widely used in medicine as an antioxidant, anti-aging, an antibacterial and anti-inflammatory agent[1].
5-Hydroxy-3-(hydroxymethyl)-7-oxabicyclo[4.1.0]hept-3-en-2-one
physcion
Physcion, also known as emodin monomethyl ether or parienin, is a member of the class of compounds known as anthraquinones. Anthraquinones are organic compounds containing either anthracene-9,10-quinone, 1,4-anthraquinone, or 1,2-anthraquinone. Physcion is practically insoluble (in water) and a very weakly acidic compound (based on its pKa). Physcion can be synthesized from 2-methylanthraquinone. Physcion can also be synthesized into torososide B and physcion 8-gentiobioside. Physcion can be found in common sage, garden rhubarb, and sorrel, which makes physcion a potential biomarker for the consumption of these food products. Physcion has also been shown to protect lichens against UV-B light, at high altitudes in Alpine regions. The UV-B light stimulates production of parietin and the parietin protects the lichens from damage. Lichens in arctic regions such as Svarlbard retain this capability though they do not encounter damaging levels of UV-B, a capability that could help protect the lichens in case of Ozone layer thinning .
Vanillin
CONFIDENCE standard compound; INTERNAL_ID 952; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 3579; ORIGINAL_PRECURSOR_SCAN_NO 3578 D002491 - Central Nervous System Agents > D000927 - Anticonvulsants D020011 - Protective Agents > D016587 - Antimutagenic Agents D020011 - Protective Agents > D000975 - Antioxidants CONFIDENCE standard compound; INTERNAL_ID 952; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 3566; ORIGINAL_PRECURSOR_SCAN_NO 3561 CONFIDENCE standard compound; INTERNAL_ID 952; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 3549; ORIGINAL_PRECURSOR_SCAN_NO 3546 CONFIDENCE standard compound; INTERNAL_ID 952; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 3560; ORIGINAL_PRECURSOR_SCAN_NO 3556 CONFIDENCE standard compound; INTERNAL_ID 952; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 3573; ORIGINAL_PRECURSOR_SCAN_NO 3570 CONFIDENCE standard compound; INTERNAL_ID 952; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 3577; ORIGINAL_PRECURSOR_SCAN_NO 3575 relative retention time with respect to 9-anthracene Carboxylic Acid is 0.504 relative retention time with respect to 9-anthracene Carboxylic Acid is 0.503 relative retention time with respect to 9-anthracene Carboxylic Acid is 0.500 Vanillin (p-Vanillin) is a single molecule extracted from vanilla beans and also a popular odor used widely in perfume, food and medicine. Vanillin (p-Vanillin) is a single molecule extracted from vanilla beans and also a popular odor used widely in perfume, food and medicine.
Isotetrahydroauroglaucin
A member of the class of benzaldehydes that is benzaldehyde substituted by hydroxy groups at positions 3 and 6, a prenyl group at position 5 and a a hept-5-en-1-yl at position 2. Isolated from Chaetomium globosum and other fungal species, it exhibits radical scavenging activities.
protocatechuic aldehyde
Protocatechualdehyde (Catechaldehyde), a natural polyphenol compound isolated from the roots of radix Salviae Miltiorrhizae, is associated with a wide variety of biological activities and has been widely used in medicine as an antioxidant, anti-aging, an antibacterial and anti-inflammatory agent[1]. Protocatechualdehyde (Catechaldehyde), a natural polyphenol compound isolated from the roots of radix Salviae Miltiorrhizae, is associated with a wide variety of biological activities and has been widely used in medicine as an antioxidant, anti-aging, an antibacterial and anti-inflammatory agent[1].
4-BROMOPHENOL
A bromophenol containing only hydroxy and bromo substituents that are para to one another. CONFIDENCE Reference Standard (Level 1); INTERNAL_ID 8650
Zeaxanthin
Meso-zeaxanthin (3R,3´S-zeaxanthin) is a xanthophyll carotenoid, as it contains oxygen and hydrocarbons, and is one of the three stereoisomers of zeaxanthin. Of the three stereoisomers, meso-zeaxanthin is the second most abundant in nature after 3R,3´R-zeaxanthin, which is produced by plants and algae. To date, meso-zeaxanthin has been identified in specific tissues of marine organisms and in the macula lutea, also known as the "yellow spot", of the human retina . Meso-zeaxanthin is a member of the class of compounds known as xanthophylls. Xanthophylls are carotenoids containing an oxygenated carotene backbone. Carotenes are characterized by the presence of two end-groups (mostly cyclohexene rings, but also cyclopentene rings or acyclic groups) linked by a long branched alkyl chain. Carotenes belonging form a subgroup of the carotenoids family. Xanthophylls arise by oxygenation of the carotene backbone. Meso-zeaxanthin is practically insoluble (in water) and an extremely weak acidic compound (based on its pKa). Meso-zeaxanthin can be found in channel catfish, crustaceans, and fishes, which makes meso-zeaxanthin a potential biomarker for the consumption of these food products. D020011 - Protective Agents > D000975 - Antioxidants > D002338 - Carotenoids Window width for selecting the precursor ion was 3 Da.; This record was created by the financial support of MEXT/JSPS KAKENHI Grant Number 16HP2005 to the Mass Spectrometry Society of Japan.
2,4-DIBROMOPHENOL
A bromophenol that is phenol in which the hydrogens at positions 2 and 4 have been replaced by bromines.
Dibutylhydroxytoluene
D020011 - Protective Agents > D000975 - Antioxidants C26170 - Protective Agent > C275 - Antioxidant CONFIDENCE standard compound; INTERNAL_ID 2454 Butylated hydroxytoluene is an antioxidant widely used in foods and in food-related products[1]. Butylated hydroxytoluene is a Ferroptosis inhibitor[2].
Butylated hydroxytoluene
D020011 - Protective Agents > D000975 - Antioxidants C26170 - Protective Agent > C275 - Antioxidant Butylated hydroxytoluene is an antioxidant widely used in foods and in food-related products[1]. Butylated hydroxytoluene is a Ferroptosis inhibitor[2].
Ionol
D020011 - Protective Agents > D000975 - Antioxidants C26170 - Protective Agent > C275 - Antioxidant Butylated hydroxytoluene is an antioxidant widely used in foods and in food-related products[1]. Butylated hydroxytoluene is a Ferroptosis inhibitor[2].
4,5-Dibromo-9,10-dihydrophenanthrene-2,3,6,7-tetrol
5-hydroxy-6-(3-methylbut-2-en-1-yl)-2-[(1E)-pent-1-en-1-yl]-1-benzofuran-4-carbaldehyde
Butylhydroxytoluene
D020011 - Protective Agents > D000975 - Antioxidants C26170 - Protective Agent > C275 - Antioxidant Same as: D02413 Butylated hydroxytoluene is an antioxidant widely used in foods and in food-related products[1]. Butylated hydroxytoluene is a Ferroptosis inhibitor[2].
2,6-DIBROMOPHENOL
A dibromophenol that is phenol in which both of the hydrogens that are ortho to the phenolic hydroxy group have been replaced by bromines. 2,6-Dibromophenol is an endogenous metabolite.
