1872-81-7 2-(p-Chlorophenethyl)-6,7-dimethoxy-1-methyl-1,2,3,4-tetrahydroisoquinoline fumarate ISOQUINOLINE, 1,2,3,4-TETRAHYDRO-2-(p-CHLOROPHENETHYL)-6,7-DIMETHOXY-1-METHYL-, Isoquinoline, 1,2,3,4-tetrahydro-2-(p-chlorophenethyl)-6,7-dimethoxy-1-methyl-, fumarate