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从云南圆果雪胆的块根中分离到一种新的葫芦素甙——雪胆乙素甙(hemsamabi-linin B)(2)。(2)经酶或酸水解得雪胆乙素(3)和 D-葡萄糖。根据(2)的 MS、~1HNMR、~(18)CNMR和乙酰化物的制备证明其结构为23,24-二氢葫芦素 F 的2-O-β-D-吡喃葡萄糖甙。
A new cucurbitacin, hemsamabi-linin B (2), was isolated from the root of Xueguo Xuedan in Yunnan. (2) It is hydrolyzed by enzymes or acids to obtain cetritine (3) and D-glucose. The 2-O-β-D-glucopyranoside with a structure of 23,24-dihydrocucurbitacin F was confirmed by MS, ~1HNMR, ~(18)CNMR and acetylation of (2).