AIDS-221608 AIDS221608 Dispiro[oxepin-2(3H),4'(3'H)-[5,6]diaza[8b]azoniaacenaphthylene-7'(5'H),2''-[2H]pyran], 7-ethyl-1',2',2'a,3'',4,4'',5'',6',6'',7,8',8'a-dodecahydro-6''-methyl-8'-[(phenylmethoxy)carbonyl]-, (2S,2a'S,6''R,7S,7''R,8'S,8a'R)-