Four new pregnane glycosides and a known pregnane glycoside (named periplocoside D, E, L, M, and N, respectively), as well as a steroidal compound S-20, have been isolated from the antitumor fraction of Periploca sepium (Asclepiadaceae). Their structures were established by chemical and spectroscopic methods. S-20 was obtained from this plant for the first time.
从 Periploca sepium(Asclepiadaceae)的抗肿瘤成分中分离出了四种新的孕烷苷和一种已知的孕烷苷(分别命名为 Periplocoside D、E、L、M 和 N),以及一种
甾体化合物 S-20。通过
化学和光谱方法确定了它们的结构。S-20 是首次从这种植物中获得。