4-Methoxy-1-thioxo-1,2,7,8-tetrahydro-6-thia-2,9a-diaza-benzo[cd]azulen-9-one 9-Methoxy-4-oxo-1,4,5,6-tetrahydroimidazo[3,4,5-e,f]-1,5-benzothiazepin-2-thione AIDS-085863 AIDS085863 NSC674921