An ent-kaurane diterpenoid from Isodon japonica var. glaucocalyx

The title compound, 14β-acet­oxy-7α-hydr­oxy-ent-kaur-16-ene-3,15-dione or glaucocalyxin B, C(22)H(30)O(5), 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 b...

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Detalles Bibliográficos
Autores principales: Bai, Su-Ping, Luo, Guo-Sheng, Zhang, Xiao-Yi, Liu, Wei
Formato: Texto
Lenguaje:English
Publicado: International Union of Crystallography 2009
Materias:
Organic Papers
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2977125/
https://www.ncbi.nlm.nih.gov/pubmed/21583588
http://dx.doi.org/10.1107/S1600536809027159
Descripción
Sumario:The title compound, 14β-acet­oxy-7α-hydr­oxy-ent-kaur-16-ene-3,15-dione or glaucocalyxin B, C(22)H(30)O(5), 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.

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