3β,6β‐Di­hydroxy­olean‐12‐en‐27‐oic acid: a cytotoxic and apoptosis‐inducing oleanane triterpenoid from the rhizome of Astilbe chinensis

3β,6β‐Di­hydroxy­olean‐12‐en‐27‐oic acid, C₃₀H₄₈O₄, a cytotoxic and apoptosis‐inducing oleanane triterpenoid, which was isolated from the rhizome of Astilbe chinensis, consists of a linear array of five fused six‐membered rings. The central ring has a slightly distorted half‐chair conformation, while the four outer rings adopt chair conformations. Two hydroxy groups and one carboxy group serve simultaneously as hydrogen‐bond donors and acceptors, forming molecular chains.