Three new flavonoids (1-3) were isolated from the ethanol extract of dried Pueraria thomsonii Benth root by various chromatography methods. Their structures were determined by NMR, MS, IR and UV. Daidzein 4'-O-glucoside-6”-O-butylmalonyl (1), 6”-O-butylmalonyldaidzin (2), and 6”-O-ethylmalonyldaidzin (3) exhibited protective effects against H₂O₂-induced oxidative damage in H9c2 cardiomyocytes with EC₅₀ values of 0.16, 0.04, and 0.07 nM, respectively.

中文翻译：

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从三个新的异黄酮粉葛广藿香和他们的保护作用的^ h ₂ Ø ₂诱导的氧化损伤的H9c2心肌细胞

三个新的黄酮（1 - 3）从干燥的乙醇提取物中分离粉葛通过各种色谱方法广藿香根。它们的结构通过NMR，MS，IR和UV确定。大豆苷元4' - O-葡萄糖苷-6” -O-丁基丙二醛（1），6” -O-丁基丙二醛（2）和6” -O-乙基丙二醛（3）对H ₂ O ₂引起的氧化损伤具有保护作用。H9c2心肌细胞中的EC ₅₀值分别为0.16、0.04和0.07 nM。