An ent-kaurane diterpenoid from Isodon japonica var. glaucocalyx
| Autor: | Su-Ping Bai, Guo-Sheng Luo, Xiao-Yi Zhang, Wei Liu |
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| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Acta Crystallographica Section E, Vol 65, Iss 8, Pp o1898-o1898 (2009) |
| Druh dokumentu: | article |
| ISSN: | 16005368 1600-5368 |
| DOI: | 10.1107/S1600536809027159 |
| Popis: | The title compound, 14β-acetoxy-7α-hydroxy-ent-kaur-16-ene-3,15-dione or glaucocalyxin B, C22H30O5, a natural ent-kaurane diterpenoid, is composed of four rings with the expected cis and trans ring junctions. In the crystal structure, there are two molecules in the asymmetric unit related by a noncrystallographic twofold screw axis, and ring A is disordered [ratio occupancies 0.829 (19):0.171 (19)], such that both chair and boat conformations are present, but with the boat conformation as the major component. In the crystal, molecules are linked by intermolecular O—H...O hydrogen bonds. |
| Databáze: | Directory of Open Access Journals |
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