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The title compound, C 30 H 48 O 3 , was extracted from the plant  Dracocephalum rupestre  Hance. The mol­ecule contains five fused cyclo­hexane rings and one five-membered lactone ring. Inter­molecular O—H⋯O hydrogen bonds between the hydroxyl and carbonyl groups link the mol­ecules into chains along [010]. The absolute structure has not been determined.

acta crystallographica. section e

(1S*,2R*,4aS*,6aS*,6bR*,10S*,12aR*,14aS*)-10-Hydroxy-1,2,6a,6b,9,9,12a-heptamethylperhydropicene-4a,14a-carbolactone