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Crystal Research and Technology |
Cryst. Res. Technol. 40,
810 (2005) - Abstract -
Configuration, conformation and crystal structure of rabdosianin b
Bao Lin Li, Yuan Jiang Pan*, Jin Li, Ling Tong, and Kai Bei Yu**
School of Chemistry and Material Science, Shaanxi Normal University, Xi’an, Shaanxi 710062, China
*Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang 310027, China
**Chengdu Institute of Organic Chemistry, Academia Sinica, Chengdu, Sichuan 610041, China
| Keywords | rabdosianin B, ent-kaurene diterpenoid, Isodon henryi, crystal structure |
| PACS | 61.66.Hq |
| DOI | 10.1002/crat.200410436 |
Rabdosianin B, C28H38O10, was the first isolated from Isodon henryi. It consists of three six-membered rings A, B, C and one five-membered ring D. The fused-ring system A, B and C are in chair, boat and chair conformations, respectively, and ring D is in an envelope conformation, on the basis of NMR and X-ray diffraction analysis. The crystal of rabdosianin B is in orthorhombic crystal system with space group P212121, lattice constants: a=9.969(1)Å, b=15.400(3)Å, and c= 17.624(3)Å, Z=4.
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