1-(2-(Allyloxy)ethyl)-2-(4-methyl-1-piperazinyl)benzimidazole fumarate (2:3) 1H-Benzimidazole, 2-(4-methyl-1-piperazinyl)-1-(2-(2-propenyloxy)ethyl)-, (E)-2-butenedioate(2:3) 87233-64-5