4-(N-Isopropylaminomethyl)-1(3),4,6,7-tetrahydro-1(3)H-pyrano(3,4-d)imidazole difumarate 95857-68-4 Pyrano(3,4-d)imidazole-4-methanamine, 1,4,6,7-tetrahydro-N-(1-methylethyl)-, (E)-2-butenedioate (1:2)