(+-)-Endo-7-Ethyl-3-(2-hydroxyphaenylsulfonyl)-5-methyl-6, {8-dioxabicyclo[3.2.1]octan} 2-((7-Ethyl-5-methyl-6,8-dioxabicyclo[3.2.1]oct-3-yl)sulfonyl)phenol AIDS-135299 AIDS135299 NSC634740