Cholester­yl isobutyl­carbonate

Cholester­yl isobutyl­carbonate, C₃₂H₅₄O₃, contains two mol­ecules (A and B) in the asymmetric unit. The isobutyl­carbonate chain of mol­ecule A and the isoprenoid tail of mol­ecule B are each conformationally disordered over two positions. The two distinct mol­ecules form separate stacks along the screw axes so that they are arranged in an antiparallel array, forming monolayers with a thickness of d₀₀₁ = 19.412 Å. The central regions of the monolayers are characterized by efficient mol­ecular packing and are separated by inter­face regions, which are more loosely packed.