Syringetin is an O-methylated flavonol, a type of flavonoid. It is found in red grape (absent in white grape), in Lysimachia congestiflora and in Vaccinium uliginosum (bog billberries). It is one of the phenolic compounds present in wine.

CAS：4423-37-4
中文别名：
英文别名：3\',5\'-O-Dimethylmyricetin;3\',5\'-Dimethoxy-3,5,7,4\'-tetrahydroxyflavone;Syringetin;3,5,7-trihydroxy-2-(4-hydroxy-3,5-dimethoxyphenyl)chromen-4-one;
分子式：C17H14O8
分子量：346.288
精确质量：346.069
Psa：129.59
Logp：2.2996

密度：1.591 g/cm3
沸点：622.4ºC at 760mmHg
熔点：287-289ºC
闪点：1.591ºC
折射率：1.707

海关编码：2914509090