7-Isopropyl-14a-dimethyl-12344a567891010a-dodeca­hydro­phenan­threne-1-carboxylic acid

摘要

The title compound, C20H32O2, has been isolated from hydrogenated rosin. There are two independent mol­ecules in the asymmetric unit. In each mol­ecule, the cyclo­hexane ring assumes a chair conformation, while the two cyclo­hexene rings adopt half-chair and envelope conformations. Inter­molecular O—H⋯O hydrogen bonding between carboxyl groups links pairs of independent mol­ecules into dimers.