18905-19-6 2-Methyl-1,7,8,12b-tetrahydrobenzo(1,2)cyclohepta(3,4,5-de)isoquinolinium chloride 2-Methyl-1,7,8,12b-tetrahydrobenzo(6,7)cyclohepta(1,2,3-de)isoquinolinium chloride Benzo(6,7)cyclohept(1,2,3-de)isoquinolinium, 1,7,8,12b-tetrahydro-2-methyl-, chloride