AIDS-218067 AIDS218067 Crambescidin 826 Dispiro[oxepin-2(3H),7'-[4H-5,6,8b]triazaacenaphthylene-4'(6'H),2''-[2H]pyran]-3'-carboxylic acid, 7-ethyl-1',2',2'a,3',3'',4,4'',5'',6'',7,8',8'a-dodecahydro-6''-methyl-, 18-[(4-amino-4-oxobutyl)(3-aminopropyl)amino]-18-oxooctadecyl ester, (2S,2a'R,3'S,4''R,6''R,7S,8a'S)-