The crystal structure of the title compound, methyl ioxo-1,4,4a,9,9a,1
0-hexahydro-1-anthraceneacetate, C16H14O5, is stabilized by intramolec
ular O-H ... O and both intra- and intermolecular C-H ... O hydrogen b
onds, Ring A, carrying the acetoxy substituent, has a sofa conformatio
n, the central ring B has an envelope conformation, while the aromatic
ring C is planar.