137048-51-2 1H-Imidazole-4-sulfonamide, 1-methyl-N-(3-(4-methyl-1-piperazinyl)propyl)-, (E)-2-butenedioate (1:1) N-(3-(4-Methylpiperazino)propyl)-1-methyl-4-imidazolesulfonamide fumarate