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The title compound, C 18 H 26 O 7 , is an eremophilenolide which has been isolated from the plant  Ligularia duciformis  for the first time. The present study confirms the atomic connectivity assigned on the basis of  1 H and  13 C NMR spectroscopy. The mol­ecule contains three fused rings, two six-membered rings in chair confomations and a five-membered ring in a flattened envelope conformation. Two hy­droxy groups are involved in formation of intra- and inter­molecular O—H⋯O hydrogen bonds. The latter ones link mol­ecules into chains propagating in [010].

3β-Acetoxy-8β,10β-dihydroxy-6β-methoxyeremophil-7(11)-en-8,12-olide