1-(4-Chlorophenethyl)-6,7-diethoxy-2-methyl-1,2,3,4-tetrahydroisoquinoline oxalate 63937-73-5 ISOQUINOLINE, 1,2,3,4-TETRAHYDRO-1-(4-CHLOROPHENETHYL)-6,7-DIETHOXY-2-METHYL-, H Isoquinoline, 1,2,3,4-tetrahydro-1-(4-chlorophenethyl)-6,7-diethoxy-2-methyl-, hydrogen oxalate