Further polyoxypregnanes from Marsdenia tenacissima.
Two new polyoxypregnanes, designated marstenacigenins A and B, along with a known compound, dresgenin, were isolated from the mild acid hydrolysate of the ethanol extract of the stems of Marsdenia tenacissima. Their structures were deduced by a combination of 1D and 2D NMR spectroscopic techniques as 12 beta-cinnamoyl-dihydrosarcostin and 12 beta,20-dibenzoyldihydrosarcostin, respectively.
Qiu
S X
SX
Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago 60612, USA.
Luo
S Q
SQ
Lin
L Z
LZ
Cordell
G A
GA
D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D015394:Molecular Structure; D010946:Plants, Medicinal; D011278:Pregnanes / Q000737:chemistry* / Q000302:isolation & purification*; D013329:Structure-Activity Relationship
D011278:Pregnanes