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The title compound, C 22 H 32 O 7 , a natural  ent -kaurane diterpenoid also referred to as Maoyecrystal F, was obtained from the medicinal plant  Isodon nervosa . There are four rings with the expected  cis  and  trans  junctions. Cyclohexane ring  A  adopts a chair conformation, rings  B  and  C  adopt boat conformations, while the five-membered ring has an envelope conformation. The mol­ecules stack along the  a  axis in the crystal and are linked together by inter­molecular O—H⋯O hydrogen bonds.

6β-Acetoxy-1α,7β,11β,15β-tetrahydroxy-7α,20-epoxy-ent-kaur-16-ene