AIDS-156281 AIDS156281 NSC365561 S-Methyl 5-(benzylthio)-2-(((methylthio)carbonyl)imino)-1,3,4-thiadiazole-3(2H)-carbothioate compound with S-methyl 5-(benzylthio)-2-(propionylimino)-1,3,4-thiadiazole-3(2H)-carbothioate (1:1)