目的 对洋紫荆Bauhinia variegate的化学成分进行研究。方法 综合利用Sephadex LH-20、Chromatorex C₁₈、Diaion HP20SS等柱色谱分离技术进行分离纯化，并综合应用HR-ESI-MS、NMR、ECD等多种波谱方法鉴定化合物结构。结果 从洋紫荆花的甲醇提取物中分离得到8个化合物，分别鉴定为4,6-二羟基亚环己基乙腈-8-β-D-葡萄糖苷（1）、L-色氨酸（2）、咖啡酸甲酯（3）、对羟基苯甲酸β-D-吡喃葡萄糖酯苷（4）、山柰酚-3-O-α-L-鼠李糖苷（5）、山柰酚-3-O-β-芸香苷（6）、山柰酚-5-O-[α-L-鼠李糖基-(1→6)-β-D-吡喃葡萄糖苷]（7）、kaempferol 3-O-β-glucopyranosyl (1→2)[α-rhamnopyranosyl(1→6)]-β-glucopyranoside（8）。结论 化合物1为新化合物，命名为蝙蝠葛氰苷G，化合物2～6、8为首次从洋紫荆中分离得到。

Objective To investigate the chemical constituents of Bauhinia variegate. Methods The methanol extract of flowers of B. variegate was isolated and purified by column chromatographies with Sephadex LH-20, Chromatorex C₁₈, Diaion HP20SS. And their structures were identified by various spectroscopic methods, such as HR-ESI-MS, NMR, ECD, et al. Results A total of eight compounds were isolated from the extract of flowers of B. variegate. Their structures were identified as 4,6-dihydroxycyclohexylideneacetonitrile-8-β-D-glucoside (1), L-tryptophan (2), methyl caffeate (3), p-hydroxybenzoyl-β-D-glucopyranoside (4), kaempferol-3-O-α-L-rhamnoside (5), kaempferol-3-O-β-rutidine (6), kaempferol-5-O-[α-L-rhamnol-(1→6)-β-D-glucuronoside] (7), kaempferol 3-O-β-glucopyranosyl(1→2)[α-rhamnopyranosyl(1→6)]-β-glucopyranoside (8). Conclusion Compound 1 is a new compound named menisdaurin G. Compounds 2-6 and 8 were obtained from the plant for the first time.

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柳州市科技攻关项目（2019B0801b006）；国家自然科学基金项目（82060764）；广西科学院基本科研业务费项目（CQZ-C-1901）；桂林市创新平台与人才计划项目（20210102-3）