1,2,3,4-Tetrahydro-6,7-dimethoxy-1,2-dimethylisoquinoline hydrochloride 6266-98-4 Carnegine, hydrochloride ISOQUINOLINE, 1,2,3,4-TETRAHYDRO-6,7-DIMETHOXY-1,2-DIMETHYL-, HYDROCHLORIDE NSC 36664