Digipregnosides A–C, three novel rearranged 11,12-secopregnane glycosides, and digipregnosides D and E, 12,20-epoxypregnane glycosides from the seeds of Digitalis purpurea
作者:Kazuhiro Takatori、Minpei Kuroda、Masaki Mishima、Yukiko Matsuo、Yoshihiro Mimaki
DOI:10.1016/j.tetlet.2021.153020
日期:2021.4
Three novel rearranged 11,12-secopregnane glycosides—named, digipregnosides A (1), B (2), and C (3)—and two novel 12,20-epoxypregnane glycosides—named, digipregnosides D (4) and E (5)—were isolated from the seeds of Digitalis purpurea. Their structures were determined based on extensive spectroscopic analysis, including long-range heteronuclear single quantum multiple bond correlation (HSQMBC) spectral
从洋地黄种子中分离出三种新型重排的 11,12-secopregnane 糖苷——命名为 digipregnosides A (1)、B (2) 和 C (3)——和两种新型 12,20-环氧孕烷糖苷——命名为 digipregnosides D (4) 和 E (5)——从洋地黄种子中分离出来。它们的结构是根据广泛的光谱分析确定的,包括远程异核单量子多键相关 (HSQMBC) 光谱数据和水解裂解的结果。化合物 1 和 4 在样品浓度为 0.001 μM 时对 SBC-3 小细胞肺癌细胞具有肿瘤选择性细胞毒性,并在 SBC-3 细胞中诱导细胞凋亡,IC50 值分别为 1.3 ± 0.16 和 0.17 ± 0.072 μM。