Nielsen J K, Nørbaek R, Olsen C E
Chemistry Department, Royal Veterinary and Agricultural University, Frederiksberg C, Denmark.
Phytochemistry. 1998 Dec;49(7):2171-6. doi: 10.1016/s0031-9422(98)00422-1.
Four flavonol glycosides were isolated from a leaf extract of cabbage and characterized by chemical and spectroscopic methods including 1H and 13C NMR and negative ion FAB-MS. The common structure of the four compounds was kaempferol 3-O-beta-D-[beta-D-glucopyranosyl(1-->2)glucopyranoside]-7- O-beta-D-[beta-D-glucopyranosyl(1-->4)glucopyranoside]. This compound was found unmodified or acylated at C-2"' (outer glucose in sophorosyl moiety) with either sinapic acid, ferulic acid or caffeic acid. The possible role of diversity in glycosylation and acylation patterns of flavonol glycosides for plant defences against herbivores is discussed.
从卷心菜叶提取物中分离出四种黄酮醇苷，并通过化学和光谱方法（包括¹H和¹³C NMR以及负离子FAB-MS）对其进行了表征。这四种化合物的共同结构是山奈酚3-O-β-D-[β-D-吡喃葡萄糖基(1→2)吡喃葡萄糖苷]-7-O-β-D-[β-D-吡喃葡萄糖基(1→4)吡喃葡萄糖苷]。发现该化合物在C-2'''（槐糖基部分的外层葡萄糖）处未被修饰或被芥子酸、阿魏酸或咖啡酸酰化。文中讨论了黄酮醇苷糖基化和酰化模式的多样性在植物抵御食草动物方面可能发挥的作用。
