Hu L, Chen Z, Xie Y
Shanghai Institute of Materia Medica, Academia Sinica, People's Republic of China.
J Nat Prod. 1996 Dec;59(12):1143-5. doi: 10.1021/np960445u.
Three new triterpenoidal saponins (1-3), together with the known compound 4, were isolated from a MeOH extract of the aerial parts of Gynostemma pentaphyllum. Their structures were elucidated on the basis of chemical and spectral methods, such as 1H-1H DQFCOSY, HMQC, HMBC, and TOCSY NMR spectra. The aglycon moiety of 1 and 2 is a new dammarane-type triterpene 12-oxo-2 alpha, 3 beta, 20 (S)-trihydroxydammar- 24-ene.
从绞股蓝地上部分的甲醇提取物中分离得到了三种新的三萜皂苷（1-3）以及已知化合物4。通过化学和光谱方法，如1H-1H DQFCOSY、HMQC、HMBC和TOCSY NMR光谱，阐明了它们的结构。化合物1和2的苷元部分是一种新的达玛烷型三萜12-氧代-2α，3β，20（S）-三羟基达玛-24-烯。
