Baicalin

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Not to be confused with baicalein.

Baicalin

IUPAC name (2S,3S,4S,5R,6S)-6-(5,6-dihydroxy-4-oxo-2-phenyl-chromen-7-yl)oxy-3,4,5-trihydroxy-tetrahydropyran-2-carboxylic acid
Other names Baicalein 7-O-glucuronide; 5,6-Dihydroxy-4-oxygen-2-phenyl-4H-1-benzopyran-7-beta-D-glucopyranose acid
Identifiers
CAS number	21967-41-9^N
PubChem	64982
ChemSpider	58507^Y
UNII	347Q89U4M5^Y
ChEBI	CHEBI:2981^Y
ChEMBL	CHEMBL485818^Y
Jmol-3D images	{{#if:O=C3\C=C(/Oc2cc(O[C@@H]1O[C@H](C(=O)O)[C@@H](O)[C@H](O)[C@H]1O)c(O)c(O)c23)c4ccccc4\|Image 1
SMILES O=C3\C=C(/Oc2cc(O[C@@H]1O[C@H](C(=O)O)[C@@H](O)[C@H](O)[C@H]1O)c(O)c(O)c23)c4ccccc4
InChI InChI=1S/C21H18O11/c22-9-6-10(8-4-2-1-3-5-8)30-11-7-12(14(23)15(24)13(9)11)31-21-18(27)16(25)17(26)19(32-21)20(28)29/h1-7,16-19,21,23-27H,(H,28,29)/t16-,17-,18+,19-,21+/m0/s1^Y Key: IKIIZLYTISPENI-ZFORQUDYSA-N^Y InChI=1/C21H18O11/c22-9-6-10(8-4-2-1-3-5-8)30-11-7-12(14(23)15(24)13(9)11)31-21-18(27)16(25)17(26)19(32-21)20(28)29/h1-7,16-19,21,23-27H,(H,28,29)/t16-,17-,18+,19-,21+/m0/s1 Key: IKIIZLYTISPENI-ZFORQUDYBD
Properties
Molecular formula	C₂₁H₁₈O₁₁
Molar mass	446.36 g mol⁻¹
Melting point	202 to 205 °C; 396 to 401 °F; 475 to 478 K
N (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Baicalin is a flavone, a type of flavonoid. It is found in several species in the genus Scutellaria, including Scutellaria lateriflora (blue skullcap). There are 10 mg/g baicalin in Scutellaria galericulata (common skullcap) leaves.^[1] Baicalin is the glucuronide of baicalein.

It is a component of Chinese medicinal herb Huang-chin (Scutellaria baicalensis) and one of the chemical ingredients of Sho-Saiko-To, an herbal supplement.

Baicalin is a known prolyl endopeptidase inhibitor,^[2] induces apoptosis in pancreatic cancer cells,^[3] and affects the GABA receptors.^{[citation needed]}

References

↑ P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979
↑ Tarragó, T; Kichik, N; Claasen, B; Prades, R; Teixidó, M; Giralt, E (2008). "Baicalin, a prodrug able to reach the CNS, is a prolyl oligopeptidase inhibitor". Bioorganic & medicinal chemistry 16 (15): 7516–24. doi:10.1016/j.bmc.2008.04.067. PMID 18650094.
↑ Takahashi H, Chen MC, Pham H, Angst E, King JC, Park J, Brovman EY, Ishiguro H, Harris DM, Reber HA, Hines OJ, Gukovskaya AS, Go VL, Eibl G (2011). "Baicalein, a component of Scutellaria baicalensis, induces apoptosis by Mcl-1 down-regulation in human pancreatic cancer cells". Biochim Biophys Acta 1813 (8): 1465–1474. doi:10.1016/j.bbamcr.2011.05.003. PMC 3123440. PMID 21596068.

Flavones and their conjugates

Aglycones

Monohydroxyflavone	6-Hydroxyflavone

Dihydroxyflavones	Chrysin (5,7-dihydroxyflavone) 4',7-Dihydroxyflavone

Trihydroxyflavones	Apigenin (5,7,4'-trihydroxyflavone) Baicalein (5,6,7-trihydroxyflavone) Norwogonin (5,7,8-Trihydroxyflavone)

Tetrahydroxyflavones	Isoscutellarein (5,7,8,4'-Tetrahydroxyflavone or 8-Hydroxyapigenin) Luteolin (3',4',5,7-Tetrahydroxyflavone) Norartocarpetin (2',4',5,7-Tetrahydroxyflavone) Scutellarein (5,6,7,4'-Tetrahydroxyflavone)

Pentahydroxyflavones	Hypolaetin (8-Hydroxyluteolin) Tricetin (5,7,3',4',5'-Pentahydroxyflavone)

O-methylated flavones	Acacetin (Apigenin 4'-methyl ether) Artocarpetin (Norartocarpetin 7-methyl ether) Diosmetin (Luteolin 4'-methyl ether) Eupatilin (5,7-Dihydroxy-3',4',6-trimethoxyflavone) Genkwanin (Apigenin 7-methyl ether) Nepetin (Luteolin 6-methyl ether) Nobiletin (3',4',5,6,7,8-Hexamethoxyflavone) Oroxylin A (Baicalein 6-methyl ether) Pratol (7-Hydroxy-4-methoxyflavone) Sinensetin (3',4',5,6,7-Pentamethoxyflavone) Tangeritin (4',5,6,7,8-Pentamethoxyflavone) Techtochrysin (Chrysin 7-methyl ether) Tricin (Tricetin 3',5'-dimethyl ether) Wogonin (Norwogonin 8-methyl ether) Zapotin (2,6,5,6-tetramethoxyflavone)

Glycosides

of apigenin	Apiin (Apigenin-7-O-apioglucoside) Apigetrin (Apigenin 7-O-glucoside) Isovitexin (Apigenin 6-C-glucoside) Rhoifolin (Apigenin 7-O-neohesperidoside) Saponarin (Isovitexin-7-O-glucoside) Schaftoside (Apigenin 6-C-glucoside 8-C-arabinoside) Vicenin-2 (Apigenin 6,8-di-C-glucoside) Vitexin (Apigenin-8-C-glucoside)

of baicalein	Baicalin (Baicalein 7-O-glucuronide) Tetuin (Baicalein 6-O-glucoside)

of hypolaetin	Hypolaetin 8-glucoside Hypolaetin 8-glucuronide

of luteolin	Cynaroside (Luteolin 7-O-glucoside) Isoorientin (Luteolin 6-C-glucoside) Orientin (Luteolin 8-C-glucoside) Veronicastroside (Luteolin 7-O-neohesperidoside) Luteolin-7-O-glucuronide

Giraldiin A (4',5,5',7-Tetrahydroxy-3-methoxy-3'-O-α-L-arabinopyranosyloxyflavone) and B (5,5',7'-Trihydroxy-2',3-dimethoxy-4'-O-β-D-glucopyranosyloxyflavone)
Nepitrin (Nepetin 7-O-glucoside)
Oroxindin (Wogonin 7-O-glucuronide)
Scutellarin (Scutellarein 7-O-glucuronide)

Acetylated

Artocarpetin A (prenylated artocarpetin)
Artoindonesianin P (prenylated)

Sulfated glycosides

Theograndin I (sulfated glucuronide of isoscutellarein) and II

Polymers

Amentoflavone

Synthetic

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