Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 4H-1-Benzopyran-4-one,2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-3-methoxy-
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1486-70-0

1486-70-0 structure

Name: 3-O-Methylquercetin
Chemical Name: 3',4',5,7-tetrahydroxy-3-methoxyflavone
CAS Number: 1486-70-0
Molecular Formula: C₁₆H₁₂O₇
Molecular Weight: 316.262
Catalog: Natural product Flavonoids
Create Date: 2018-08-21 22:26:36
Modify Date: 2025-08-25 00:38:19
3-O-Methylquercetin (3-MQ), a main constituent of Rhamnus nakaharai, inhibits total cAMP and cGMP-phosphodiesterase (PDE) of guinea pig trachealis. 3-O-Methylquercetin (3-MQ) exhibits IC50 values of 31.9 μM， 86.9 μM， 18.6 μM and 1.6 μM for PDE1, PDE5, PDE2 and PDE4, respectively[1].

Name	3',4',5,7-tetrahydroxy-3-methoxyflavone
Synonyms	2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-3-methoxychromen-4-one 2-(3,4-Dihydroxyphenyl)-5,7-dihydroxy-3-methoxy-4H-chromen-4-one 3-methoxy-5,7,3',4'-tetrahydroxy-flavone 2-(3,4-Dihydroxyphenyl)-5,7-dihydroxy-3-methoxy-4H-1-benzopyran-4-one 3-O-Methylquercetin 4H-1-Benzopyran-4-one, 2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-3-methoxy-

Description	3-O-Methylquercetin (3-MQ), a main constituent of Rhamnus nakaharai, inhibits total cAMP and cGMP-phosphodiesterase (PDE) of guinea pig trachealis. 3-O-Methylquercetin (3-MQ) exhibits IC50 values of 31.9 μM， 86.9 μM， 18.6 μM and 1.6 μM for PDE1, PDE5, PDE2 and PDE4, respectively[1].
Related Catalog	Signaling Pathways >> Metabolic Enzyme/Protease >> Phosphodiesterase (PDE) Research Areas >> Inflammation/Immunology
References	[1]. Wun-Chang Ko, et al. 3-O-methylquercetin More Selectively Inhibits Phosphodiesterase Subtype 3. Planta Med. 2003 Apr;69(4):310-5.

HS Code	2914509090
Summary	HS:2914509090 other ketones with other oxygen function VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:5.5% General tariff:30.0%