Indonesian Medicinal Plants. V. Chemical Structures of Calotroposides C, D, E, F, and G, Five Additional New Oxypregnane-Oligoglycosides from the Root of Calotropis gigantea (Asclepiadaceae).

Chemical and Pharmaceutical Bulletin
1992.0

Abstract

Following the chemical characterization of calotroposides A (1) and B (2), five related oxypregnane-oligoglycosides named calotroposides C (3), D (4), E (5), F (6), and G (7) have been additionally isolated from the root of Calotropis gigantea (Asclepiadaceae), an Indonesian medicinal plant. The chemical structures of the new calotroposides have been elucidated on the basis of chemical and physicochemical properties as 12-O-benzovldeacetylmetaplexigenin 3-O-B-D-oleandropyranosyl(1->4)-B-D-oleandropyranosyl(1->4)-B-D-oleandropyranosyl(1->4)-B-D-cymaropyranosyl(1->4)β-D-cymaropyranoside for 3, 12-O-benzoyllineolon 3-O-β-D-oleandropyranosyl(1→4)-β-D-oleandropyranosyl(1→4)-β-D-oleandropyranosyl (1→4)-β-D-cymaropyranosyl (1→4)-β-D-cymaropyranoside for 4, 12-O-benzoyldeacetylmetaplexigenin 3-O-β-D-oleandropyranosyl(1->4)-β-D-oleandropyranosyl(1->4)-β-D-cymaropyranosyl(1->4)-β-D-cymaropyranoside for 5, 12-O-benzovllineolon 3-O-B-D-oleandropyranosyl (1→4)-B-D-oleandropyranosyl (1→4)-B-D-cymaropyranosyl(1->4)-β-D-cymaropyranoside for 6, and 12-O-benzoyllineolon 3-O-β-D-oleandropyranosyl(1->4)-β-D-cymaropyranosyl (1→4)-β-D-cymaropyranoside for 7.

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