2,2-Dimethyl-succinic acid 4-((3S,4aR,6aR,6bR,8aS,12bS,14aR,14bR)-8a-carboxy-4,4,6a,6b,11,11,14b-heptamethyl-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12b,13,14,14a,14b-eicosahydro-picen-3-yl) ester 3-O-(3',3'-Dimethylsuccinyl)moronic acid AIDS-113495 AIDS113495