1,2,3,6-Tetrahydro-1-methyl-4-phenylpyridine hydrochloride 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine hydrochloride 23007-85-4 MPTP hydrochloride N-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine hydrochloride Pyridine, 1,2,3,6-tetrahydro-1-methyl-4-phenyl-, hydrochloride