3993-28-0 5-Methyl-3-((2-(4-morpholinyl)ethyl)thio)-5H-[1,2,4]triazino[5,6-b]indole 5-Methyl-5H-[1,2,4]triazino[5,6-b]indol-3-yl 2-(4-morpholinyl)ethyl sulfide AIDS-127745 AIDS127745 NSC183515