3α,20-Bis(dimethyl­amino)-4,4,14-trimethyl-9,19-cyclo-5α-pregnan-16-ol

The title compound, C28H50N2O, also known as cyclo­virobuxine A, was obtained from N-methyl­ation of naturally occurring cyclo­virobuxine D. It has a four-ring triterpenoid nucleus in a trans–cis–trans configuration. The six-membered rings have chair conformations, while the conformation of the five-membered ring is an envelope.