1,4,6,7-Tetrahydrothiopyrano(3,4-d)imidazole-4-methanamine (E)-2-butenedioate (2:3) 100650-73-5 4-Aminomethyl-1(3),4,6,7-tetrahydro-1(3)H-thiopyrano(3,4-d)imidazole fumarate (2:3) Thiopyrano(3,4-d)imidazole-4-methanamine, 1,4,6,7-tetrahydro-, (E)-2-butenedioate (2:3)