Polyhydroxypregnane glycosides from Oxystelma esculentum var. alpini |
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| Authors: | Hamed Arafa I Sheded Mohamed G Shaheen Abd El-Samei M Hamada Fatma A Pizza Cosimo Piacente Sonia |
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| Institution: | Faculty of Science, South Valley University, Aswan 81528, Egypt. |
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| Abstract: | Three new polyhydroxypregnane glycosides named alpinoside A kidjolanin 3-O-beta-d-glucopyranosyl-(1-->4)-beta-d-glucopyranosyl-(1-->4)-beta-d-thevetopyranosyl-(1-->4)-beta-d-cymaropyranosyl-(1-->4)-beta-d-cymaropyranoside], alpinoside B kidjolanin 3-O-beta-d-glucopyranosyl-(1-->4)-beta-d-thevetopyranosyl-(1-->4)-beta-d-cymaropyranosyl-(1-->4)-beta-d-cymaropyranoside], and alpinoside C kidjolanin 3-O-beta-d-glucopyranosyl-(1-->4)-beta-d-glucopyranosyl-(1-->4)-beta-d-oleandropyranosyl-(1-->4)-beta-d-cymaropyranosyl-(1-->4)-beta-d-cymaropyranoside] were isolated from the leaves of Oxystelma esculentum var. alpini. The structure elucidation was accomplished by extensive spectroscopic analysis and acid-catalyzed hydrolysis. |
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| Keywords: | Oxystelma esculentum var alpini Asclepiadaceae Polyhydroxypregnane glycosides NMR |
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