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木文报道苦玄参提取物中的抗肿瘤活性部分,经酸水解后又分得两个新四环三萜苷元,苦玄参苷元(picfeltarraegenin)Ⅴ和Ⅵ。根据其UV,~1H NMR,~13C NMR,MS数据以及化学反应,证明苦玄参苷元Ⅴ和Ⅵ分别具有5和8的结构,5的结构经苦玄参苷元Ⅰ(1)的双乙酸酯(7)氧化成6而加以确证。
Mu Wen reported bitter figwort extract part of the antitumor activity, acid hydrolysis and then split two new tetracyclic glycosides glycosides (picfeltarraegenin) Ⅴ and Ⅵ. According to their UV, ~ 1H NMR, ~ 13C NMR, MS data and chemical reaction, it was demonstrated that the structures of 5 and 8 of bitter figurgens Ⅴ and Ⅵ, respectively, Acetate (7) was oxidized to 6 and confirmed.