184691-46-1 1H-Pyrido(3,4-b)indole-1,3(2H)-dione, 4,9-dihydro-9-methyl-2-(3-(4-morpholinyl)propyl)- 4,9-Dihydro-9-methyl-2-(3-(4-morpholinyl)propyl)-1H-pyrido(3,4-b)indole-1,3(2H)-dione