title: Polyoxypregnane glycosides from the flowers of Dregea volubilis.
abstract: Three novel polyoxypregnane glycosides, volubiloside A, B and C (1-3), were isolated from the flowers of Dregea volubilis Linn., and their structures were elucidated as drevogenin D-3-O-beta-D-glucopyranosyl (1-->4)-6-deoxy-3-O-methyl-beta-D-allopyranosyl (1-->4)-beta-D-cymaropyranosyl (1-->4)-beta-D-cymaropyranoside, drevogenin D-3-O-beta-D-glucopyranosyl (1-->4)-6-deoxy-3-O-methyl-beta-D-allopyranosyl (1-->4)-beta-D-cymaropyranosyl (1-->4)-beta-D-digitoxopyranoside and drevogenin P-3-O-beta-D-glucopyranosyl (1-->4)-6-deoxy-3-O-methyl-beta-D-allopyranosyl (1-->4)-beta-D-cymaropyranosyl (1-->4)-beta-D-cymaropyranoside, respectively, on the basis of extensive NMR experiments, MALDI-TOF MS, and some chemical strategies.
authors.affiliation: Indian Institute of Chemical Biology, 4 Raja SC Mullick Road, Jadavpur, -700032, Kolkata, India. npsahu@iicb.res.in
authors.forename: Niranjan
authors.initials: N
authors.lastname: Sahu
authors.forename: Nilendu
authors.initials: N
authors.lastname: Panda
authors.forename: Nirup
authors.initials: N
authors.lastname: Mandal
authors.forename: Sukdeb
authors.initials: S
authors.lastname: Banerjee
authors.forename: Kazuo
authors.initials: K
authors.lastname: Koike
authors.forename: Tamotsu
authors.initials: T
authors.lastname: Nikaido
mesh_terms: D029062:Apocynaceae / Q000737:chemistry*; D035264:Flowers / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D006027:Glycosides; D012503:Saponins; C473517:volubiloside A; C473518:volubiloside B; C473519:volubiloside C