1H-Benzimidazole, 4,5,6,7-tetrahydro-1-ethyl-5-(1-piperidinyl)-, (E)-2-butenedioate (1:3) 4,5,6,7-Tetrahydro-1-ethyl-5-(1-piperidinyl)-1H-benzimidazole (E)-2-butenedioate (1:3) 96233-55-5