7-Glycoloyl-2-hydroxy-1,4b,7,10a-tetramethyl-4a,4b,5,6,7,8,8a,9,10,10a-decahydrophenanthren-3(4H)-one

Abstract

The title compound, C20H30O4, is a diterpenoid which was isolated from the roots of Ceriops tagal (Perr.). The asymmetric unit consists of three crystallographically independent mol­ecules, which are conformationally almost identical. The mol­ecule has three fused rings in the structure; the cyclo­hexene ring A adopts a half chair conformation and the two cyclo­hexane rings B and C are in standard chair conformations. The mol­ecular structure is stabilized by intra- and inter­molecular O—H⋯O hydrogen bonds and weak C—H⋯O inter­actions. In the crystal structure, mol­ecules are linked into infinite one-dimensional chains along the b axis.