4,7-Methanocyclopropa[c]s-indacene-4a(7H)-carboxylic acid, 1,1-dichloro-4-formyl-7a-[(hexyloxy)methyl]-1,1a,2,3,3a,4,7a,8-octahydro-1a-methyl-5-(1-methylethyl)-, (1aS,3aS,4aR)- AIDS-154623 AIDS154623