C21 steroidal glycosides from Hemidesmus indicus.
Two novel pregnane glycosides, denicunine (1) and heminine (4), have been isolated from the dried stem of Hemidesmus indicus R.Br. (family: Asclepiadaceae). Chemical transformations and spectroscopic evidence viz: 1H and 13C NMR spectroscopy and FABMS are consistent with the structures calogenin 3-O-3-O-methyl-beta-D-fucopyranosyl-(1-->4)-O-beta-D-oleandropyranosi de and calogenin 3-O-beta-D-cymaropyranosyl-(1-->4)-O-beta-D-digitoxopyranoside+ ++, respectively.
Sigler
P
P
Department of Chemistry, Lucknow University, India.
Saksena
R
R
Deepak
D
D
Khare
A
A
D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D019684:Magnoliopsida / Q000737:chemistry*; D015394:Molecular Structure; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013256:Steroids / Q000737:chemistry*
D006027:Glycosides; D013256:Steroids