A new caffeoyl glycoside of β, 3, 4-trihydroxyphenethyl alcohol, designated as suspensaside (1), was isolated from the fruits of Forsythia suspensa VAHL (Oleaceae). The structure of 1 was established as DL-β, 3, 4-trihydroxyphenethyl-O-α-L-rhamnopyranosyl-(1→6)-4-O-caffeoyl-β-D-glucopyranoside on the basis of analysis of the carbon-13 nuclear magnetic resonance spectrum and chemical evidence. Compound 1 exhibited antibacterial activity against Staphylococcus aureus TERASHIMA. with MIC 4.1 mM (2.6 mg/ml).
从连翘果实中分离出一种新的β,3,4-三羟基
苯乙醇咖啡酰糖苷,命名为悬钩子苷(1)。根据碳-13 核磁共振谱分析和
化学证据,确定了 1 的结构为 DL-β,3,4-三羟基苯乙基-O-α-
L-鼠李糖基-(1→6)-4-O-咖啡酰-β-
D-吡喃葡萄糖苷。化合物 1 对
金黄色葡萄球菌 TERASHIMA 具有抗菌活性,MIC 为 4.1 mM(2.6 mg/ml)。