3:1 mixture of Trans-9a-cisiod-5a,4- and Trans-9a-transiod-5a,4-2,4-diphenyl-1,4,5a,6,7,8,9,9a-octahydrobenzo[4,5]imidazo[1,2-a]pyrimidine AIDS-085368 AIDS085368 NSC685483