A pregnane glycoside from the roots of Mandevilla pentlandiana
A pregnane triglycoside containing a new genin 3β,14β-dihydroxy-21-methoxy-5β-pregnan-20-one has been isolated from the dried roots of Mandevilla pentlandiana. Chemical and spectroscopic evidence for the glycoside are consistent with the structure 3β,14β-dihydroxy-21-methoxy-5β-pregnan-20-one-3-O- β...
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| Autores principales: | , , |
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| Formato: | JOUR |
| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00319422_v32_n1_p171_Cabrera |
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| Sumario: | A pregnane triglycoside containing a new genin 3β,14β-dihydroxy-21-methoxy-5β-pregnan-20-one has been isolated from the dried roots of Mandevilla pentlandiana. Chemical and spectroscopic evidence for the glycoside are consistent with the structure 3β,14β-dihydroxy-21-methoxy-5β-pregnan-20-one-3-O- β-d-diginopyranosyl-(1→4)- O-β-d-cymaropyranosyl-(1→4)-O-β-d-cymaropyranoside. It is noteworthy that 3β,14β, 21-trihydroxy 5β-pregnan-20-one, biosynthetically related to the genin of this glycoside, has been proved to be a precursor of cardenolides, also produced by this plant. © 1993. |
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