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The title compound, C 24 H 34 O 4 , is a precursor of Megestrol acetate. Ring  A  has a half-chair conformation [ Q  = 0.446 (3) Å, θ = 54.6 (4)° and ϕ = 9.5 (4)°]. Ring  D  adopts a 13β-envelope conformation [ Q  = 0.463 (2) Å and ϕ = 188.2 (3)°].

6β-Methyl-3,20-dioxopregn-4-en-17-yl acetate