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前已报道葫芦科(Cucurbitaceae)植物假贝母(Bolbostemma paniculatum [Maxim]Franquet)鳞茎土贝母中四个三萜皂苷土贝母苷甲、乙、丙、丁的提取与分离以及土贝母苷甲的结构研究.本文继续报道其余三个皂苷的结构研究. 土贝母苷乙(1),白色粉末,C_(63)H_(98)O_(30),[α]_D—6.0(c0.32,吡啶),M_r1334(SIMS: m/(?)1335[M+H]~+).苷元为远志酸(2),所含的糖为葡萄糖、鼠李糖、阿拉伯糖和木糖,摩尔比为1:1:2:1.1的~(13)C NMR谱中显示五个糖端基碳信号(δ106.4,104.8,103.2,100.8和94.3
Previously, the extraction and isolation of four triterpene saponins, terpene glycosides, b, c, and d in the bulb of Fritillaria of the family Cucurbitaceae (Bombostemma paniculatum [Maxim] Franquet) and the isolation of terbinaside have been reported. The structure of A. This article continues to report the structure of the remaining three saponins. Fritillaria glycoside B (1), white powder, C_ (63) H_ (98) O_ (30), [α]_D - 6.0 (c0. 32, pyridine), M_r1334 (SIMS: m/(?) 1335 [M+H]~+). The aglycon is polygalaic acid (2) and the sugars contained are glucose, rhamnose, arabinose, and xylose. The 13C NMR spectra with a molar ratio of 1:1:2:1.1 show five sugar end group carbon signals (δ106.4, 104.8, 103.2, 100.8, and 94.3)