54971-35-6 5H-ISOQUINO(2,1-d)(1,4)BENZODIAZEPIN-8-IUM, 6,7,9,10-TETRAHYDRO-12,13-DIMETHOXY- 5H-Isoquino(2,1-d)(1,4)benzodiazepin-8-ium, 6,7,9,10-tetrahydro-12,13-dimethoxy-7-methyl-6-oxo-, bromide