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Abstract Detail


Recent Topics Posters

Oyama, Masayoshi [1], Iliya, Ibrahim [2], Tanaka, Toshiyuki [3], Iinuma, Munekazu [1].

Steroids as Chemotaxonomic Markers in Asclepiadaceous Succulents.

As a part of our studies on Nigerian folkloric medicinal plants, we have investigated the chemical constituents of Caralluma dalzielii and Ceropegia deightonii (fam. Apocynaceae, subfam. Asclepiadoideae). Five new steroidal glycosides, consisted of 5,6-dihydrosarcostins with various ester groups, were isolated from C. dalzielii , although tomentogenin-oriented steroids were common in the Malian species. This finding indicated the presence of chemical races between the two domestics. Also, a novel steroid, 2,21-dihydroxy-4,6-pregnadiene-3,20-dione, was isolated from C. deightonii . The related pregnanes were identified in some Apocynaceous plants such as Apocynum sp. and Nerium sp. . We will present other chemical constituents from Raphionacme burkei as well.


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1 - Gifu Pharmaceutical University, Department of Pharmacognosy, 5-6-1 Mitahora-higashi, Gifu, 502-8585, Japan
2 - Ahmadu Bello University, Department of Pharmaceutical and Medicinal Chemistry, Zaria, Nigeria
3 - Gifu Pharmaceutical University, Department of Natural Resources, 5-6-1 Mitahora-higashi, Gifu, 502-8585, Japan

Keywords:
Apocynaceae
Asclepiadoideae
Caralluma dalzielii
Ceropegia deightonii
steroids.

Presentation Type: Recent Topics Poster
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P79011
Abstract ID:2567


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