title: Indonesian medicinal plants. I. Chemical structures of calotroposides A and B, two new oxypregnane-oligoglycosides from the root of Calotropis gigantea (Asclepiadaceae).
abstract: Two new oxypregnane-oligoglycosides named calotroposides A (1) and B (2) have been isolated from the root of Calotropis gigantea (Asclepiadaceae), an Indonesian medicinal plant, and their chemical structures have been elucidated by chemical and spectroscopic methods as 12-O-benzoyllineolon 3-O-beta-D-cymaropyranosyl(1----4)-beta-D-oleandropyranosyl( 1----4)- beta-D-oleandropyranosyl(1----4)-beta-D-cymaropyranosyl(1--- -4)-beta-D- cymaropyranoside and 12-O-benzoyldeacetylmetaplexigenin 3-O-beta-D-cymaropyranosyl(1---4)-beta-D-oleandropyranosyl(- ---4)- beta-D-oleandropyranosyl(1----4)-beta-D-cymaropyranosyl(1--- -4)- beta-D-cymaropyranoside, respectively.
authors.affiliation: Faculty of Pharmaceutical Sciences, Osaka University, Japan.
authors.forename: I
authors.initials: I
authors.lastname: Kitagawa
authors.forename: R S
authors.initials: RS
authors.lastname: Zhang
authors.forename: J D
authors.initials: JD
authors.lastname: Park
authors.forename: N I
authors.initials: NI
authors.lastname: Baek
authors.forename: Y
authors.initials: Y
authors.lastname: Takeda
authors.forename: M
authors.initials: M
authors.lastname: Yoshikawa
authors.forename: H
authors.initials: H
authors.lastname: Shibuya
mesh_terms: D010277:Parasympathomimetics / Q000138:chemical synthesis* / Q000494:pharmacology; D010946:Plants, Medicinal / Q000737:chemistry*; D011278:Pregnanes; D012503:Saponins / Q000138:chemical synthesis* / Q000494:pharmacology
chemical_list: D010277:Parasympathomimetics; D011278:Pregnanes; D012503:Saponins; C077813:calotroposide A; C077814:calotroposide B