- Polyhydroxy pregnanes from Dregea volubilis
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Three new polyhydroxy pregnanes named dregealol (1), volubilogenone (2) and volubilol (3) were isolated from the flowers of Dregea volubilis, and their structures elucidated from extensive 2D NMR analysis. The structure of volubilol (3) was confirmed by X
- Panda, Nilendu,Mondal, Nirup B.,Banerjee, Sukdeb,Sahu, Niranjan P.,Koike, Kazuo,Nikaido, Tamotsu,Weber, Manuela,Luger, Peter
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- TENASOGENIN, A PREGNANE ESTER FROM MARSDENIA TENACISSIMA
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A new polyhydroxy pregnane ester named tenasogenin was isolated from the seeds of Marsdenia tenacissima.On the basis of chemical and spectroscopic evidence and identification of its hydrolysis products, its structure has been established as 11α-O-β,β-dimethylacryloyl-3β,12β,14β,20R-tetrahydroxypregn-5-ene.Key Word Index: Marsdenia tenacissima; Asclepiadaceae; tenasogenin; steroid; polyhydroxy pregnane ester.
- Singhal, Shobha,Khare, Maheshwari P.,Khare, Anakshi
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- Polyoxypregnane glycosides from the flowers of Dregea volubilis
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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-β-D-glucopyranosyl (1→4)-6-deoxy-3-O-methyl-β-D-allopyranosyl (1→4)-β-D-cymaropyranosyl (1→4)-β-D-cymaropyranoside, drevogenin D-3-O-β-D-glucopyranosyl (1→4)-6-deoxy-3-O-methyl-β-D-allopyranosyl (1→4)-β-D-cymaropyranosyl (1→4)-β-D-digitoxopyranoside and drevogenin P-3-O-β-D-glucopyranosyl (1→4)-6-deoxy-3-O-methyl-β-D-allopyranosyl (1→4)-β-D-cymaropyranosyl (1→4)-β-D-cymaropyranoside, respectively, on the basis of extensive NMR experiments, MALDI-TOF MS, and some chemical strategies.
- Sahu, Niranjan P.,Panda, Nilendu,Mandal, Nirup B.,Banerjee, Sukdeb,Koike, Kazuo,Nikaido, Tamotsu
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p. 383 - 388
(2007/10/03)
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