stigmastanol [ 24 alpha-ethyl-5 alpha-cholestan-3 beta-ol,24 alpha-ethyl-5 beta-cholestan-3 alpha-ol,beta-sitostanol,dihydrositosterol,sitostanol,stigmastanol, (3beta,5beta,24S)-isomer ] saturated analog of beta-sitosterol; RN given refers to (3beta,5alpha)-isomer