title: C21 steroidal glycosides from Hemidesmus indicus.
abstract: 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.
authors.affiliation: Department of Chemistry, Lucknow University, India.
authors.forename: P
authors.initials: P
authors.lastname: Sigler
authors.forename: R
authors.initials: R
authors.lastname: Saksena
authors.forename: D
authors.initials: D
authors.lastname: Deepak
authors.forename: A
authors.initials: A
authors.lastname: Khare
mesh_terms: 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*
chemical_list: D006027:Glycosides; D013256:Steroids