11a,6a-(Epoxyethano)-1,5-methano-11H-azocino[3,4-b]indole-6-carboxylic acid, 4-ethylidene-1,4,5,6-tetrahydro-13-methoxy-, methyl ester, 2-oxide, (4Z)- AIDS-133358 AIDS133358 Alschomine NSC628823