1-Piperidineacetamide, N-(1,2,3,4-tetrahydro-2-methyl-4-phenyl-8-isoquinolyl)-, maleate (1:2) 91454-31-8 N-(2-Methyl-4-phenyl-1,2,3,4-tetrahydro-8-isoquinolyl)-1-piperidineacetamide maleate (1:2)