A diterpenoid from Isodon japonica var. glaucocalyx

作者:Ma Xing Ke; He Zhi An; Bai Su Ping*
来源:Acta Crystallographica Section E-Structure Reports Online, 2007, 63: O4203-U2335.
DOI:10.1107/S1600536807043048

摘要

The title compound, 7 alpha, 14 beta-dihydroxy-ent-kaur-16-ene- 3,-5-dione or glaucocalyxin A, C20H28O4, a natural ent-kaurane diterpenoid, is composed of four rings with the expected cis and trans junctions. In the crystal structure, the molecules are linked together by O-H center dot center dot center dot O hydrogen bonds to form double chains running along the shortest cell axis.

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