[Novel triterpenoids from Cynanchum hancockianum].
Four new triterpenoids have been isolated from the petroleum ether extract of Cyananchum hancockianum (Maxim) Al. Iljinski (Asclepiadaceae). On the basis of spectral data (1HNMR, 13CNMR, 1H-1H COSY, 1H-13C COSY, longrange 1H-13C COSY, MS, X-Ray analysis) and chemical connections, they were identified as hancockinol (Ia), hancolupenol (IIa), hancolupenone (IIc), and hancolupenol octacosanate (IId). They are of new skeletons with B/C cis, C/D trans, D/E cis junctures for Ia and with A/B trans, C/D trans, D/E cis junctures for IIa, IIc and IId.
Lou
H X
HX
Division of Natural Product Research, Shengyang College of Pharmacy.
Li
X
X
Zhu
T R
TR
D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D008968:Molecular Conformation; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
D004365:Drugs, Chinese Herbal; D014315:Triterpenes; C073852:hancockinol; C073851:hancolupenol; C073850:hancolupenone