1,2,3,4-Tetrahydro-2-methylisoquinoline hydrochloride 1,2,3,4-Tetrahydro-2-methylleucoline hydrochloride 1612-65-3 53112-33-7 ISOQUINOLINE, N-METHYL-1,2,3,4-TETRAHYDRO-, HYDROCHLORIDE Isoquinoline, 1,2,3,4-tetrahydro-2-methyl-, hydrochloride N-Methyl-1,2,3,4-tetrahydroisoquinoline hydrochloride