1.0 2010-04-08 22:05:28 UTC 2025-11-18 22:39:24 UTC FDB002675 Tambulin Tambulin, also known as herbacetin 7,8,4'-trimethyl ether, is a member of the class of compounds known as flavonols. Flavonols are compounds that contain a flavone (2-phenyl-1-benzopyran-4-one) backbone carrying a hydroxyl group at the 3-position. Thus, tambulin is considered to be a flavonoid lipid molecule. Tambulin is practically insoluble (in water) and a very weakly acidic compound (based on its pKa). Tambulin can be found in sunflower, which makes tambulin a potential biomarker for the consumption of this food product. 3,5-Dihydroxy-4',7,8-trimethoxyflavone 5-Hydroxy-4',7,8-trimethoxyflavonol Herbacetin 7,8,4'-trimethyl ether Tambulin C18H16O7 344.3154 344.089602866 3,5-dihydroxy-7,8-dimethoxy-2-(4-methoxyphenyl)-4H-chromen-4-one tambulin 571-72-2 COC1=CC=C(C=C1)C1=C(O)C(=O)C2=C(O1)C(OC)=C(OC)C=C2O InChI=1S/C18H16O7/c1-22-10-6-4-9(5-7-10)16-15(21)14(20)13-11(19)8-12(23-2)17(24-3)18(13)25-16/h4-8,19,21H,1-3H3 KAPZSMYEZDLAFB-UHFFFAOYSA-N belongs to the class of organic compounds known as flavonols. Flavonols are compounds that contain a flavone (2-phenyl-1-benzopyran-4-one) backbone carrying a hydroxyl group at the 3-position. Flavonols Organic compounds Phenylpropanoids and polyketides Flavonoids Flavones Aromatic heteropolycyclic compounds 1-hydroxy-2-unsubstituted benzenoids 3-hydroxyflavonoids 4'-O-methylated flavonoids 5-hydroxyflavonoids 7-O-methylated flavonoids 8-O-methylated flavonoids Alkyl aryl ethers Anisoles Chromones Heteroaromatic compounds Hydrocarbon derivatives Methoxybenzenes Organic oxides Oxacyclic compounds Phenoxy compounds Pyranones and derivatives Vinylogous acids 1-benzopyran 1-hydroxy-2-unsubstituted benzenoid 3-hydroxyflavone 3-hydroxyflavonoid 4p-methoxyflavonoid-skeleton 5-hydroxyflavonoid 7-methoxyflavonoid-skeleton 8-methoxyflavonoid-skeleton Alkyl aryl ether Anisole Aromatic heteropolycyclic compound Benzenoid Benzopyran Chromone Ether Heteroaromatic compound Hydrocarbon derivative Hydroxyflavonoid Methoxybenzene Monocyclic benzene moiety Organic oxide Organic oxygen compound Organoheterocyclic compound Organooxygen compound Oxacycle Phenol ether Phenoxy compound Pyran Pyranone Vinylogous acid Flavones and Flavonols Flavones and Flavonols dihydroxyflavone flavonols flavonols trimethoxyflavone logp 2.25 ALOGPS logs -3.82 ALOGPS solubility 5.25e-02 g/l ALOGPS melting_point Mp 205° logp 2.59 ChemAxon pka_strongest_acidic 8.5 ChemAxon pka_strongest_basic -3.9 ChemAxon iupac 3,5-dihydroxy-7,8-dimethoxy-2-(4-methoxyphenyl)-4H-chromen-4-one ChemAxon average_mass 344.3154 ChemAxon mono_mass 344.089602866 ChemAxon smiles COC1=CC=C(C=C1)C1=C(O)C(=O)C2=C(O1)C(OC)=C(OC)C=C2O ChemAxon formula C18H16O7 ChemAxon inchi InChI=1S/C18H16O7/c1-22-10-6-4-9(5-7-10)16-15(21)14(20)13-11(19)8-12(23-2)17(24-3)18(13)25-16/h4-8,19,21H,1-3H3 ChemAxon inchikey KAPZSMYEZDLAFB-UHFFFAOYSA-N ChemAxon polar_surface_area 94.45 ChemAxon refractivity 90.31 ChemAxon polarizability 34.61 ChemAxon rotatable_bond_count 4 ChemAxon acceptor_count 7 ChemAxon donor_count 2 ChemAxon physiological_charge 0 ChemAxon formal_charge 0 ChemAxon Specdb::MsMs 93672 Specdb::MsMs 93673 Specdb::MsMs 93674 Specdb::MsMs 157491 Specdb::MsMs 157492 Specdb::MsMs 157493 Specdb::MsMs 3599110 Specdb::MsMs 3599111 Specdb::MsMs 3599112 Specdb::MsMs 3599113 Specdb::MsMs 3599114 Specdb::MsMs 3599115 Sunflower Type 1 specific Helianthus annuus 4232