1-Isopropyl-8-methoxy-1,2,3,4-tetrahydropyrimido(1,2-a)benzimidazole methanesulfonate 79513-58-9 Pyrimido(1,2-a)benzimidazole, 1,2,3,4-tetrahydro-1-isopropyl-8-methoxy-, methanesulfonate