Steroidal Glycosides from the Fresh Stem of Stephanotis lutchuensis var. japonica (Asclepiadaceae). Chemical Structures of Stephanosides K-Q.
Bibliographic Information
- Other Title
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- Steroidal Glycosides from the Fresh Ste
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Abstract
The structural elucidation of seven related oxypregnane-oligoglycosides stephanosides K (1), L (2), M (3), N(4), O (5), P (6), and Q (7) from the fresh stem of Stephanotis lutchuensis var. japonica (Asclepiadaceae) was achieved through on a detailed study of their high-field 1H- and 13C-NMR spectra. The results show that all the sugars are β (1→4)-linked. The aglycones of stephanosides K, M, and O, and stephanosides L, N, and P were identified as 12-O-cinnamoyl-20-O-(E)-2-methyl-2-butenoyl, and 12-O-cinnamoyl-20-O-nicotinoyl derivatives of(20S)-pregn-6-ene-3β, 5α, 8β, 12β, 14β, 17β, 20-heptaol, respectively. The aglycone of stephanoside Q was 12-O-cinnamoyldeacetylmetaplexigenin (kidjoranin).
Journal
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- Chemical and Pharmaceutical Bulletin
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Chemical and Pharmaceutical Bulletin 44 (12), 2243-2248, 1996
The Pharmaceutical Society of Japan
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Details 詳細情報について
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- CRID
- 1390282679137737216
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- NII Article ID
- 130003773361
- 110003631851
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- NII Book ID
- AA00602100
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- COI
- 1:CAS:528:DyaK2sXitFyrtQ%3D%3D
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- ISSN
- 13475223
- 00092363
- http://id.crossref.org/issn/00092363
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- NDL BIB ID
- 4098953
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- PubMed
- 8996855
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- Abstract License Flag
- Disallowed