3-(4-Methoxyphenyl)-6,8,8-trimethyl-7,8-dihydro[1,3]thiazolo[3,2-b][1,2,4]triazepine AIDS-138560 AIDS138560 Methyl 4-(6,8,8-trimethyl-7,8-dihydro[1,3]thiazolo[3,2-b][1,2,4]triazepin-3-yl)phenyl ether NSC645604