2,19-Dihydroxy-3-oxo-(2α,4α,19α)-24-nor-olean-12-en-28-oic acid monohydrate

Abstract

The title triterpenoid compound, C29H44O5·H2O, was isolated from Terminalia triptera. The mol­ecule contains five fused six-membered rings, with three rings in chair, one in an envelope and one in half-chair conformations. The D and E rings are cis-fused, while the other ring junctions are trans-fused. An intra­molecular O—H⋯O hydrogen bond generates an S(5) ring motif. In the crystal structure, the mol­ecules are linked into a three-dimensional network by O—H⋯O hydrogen bonds and a weak C—H⋯O inter­molecular inter­action. The crystal structure is stabilized by intra- and inter­molecular O—H⋯O hydrogen bonds and weak C—H⋯O inter­actions.