1978-61-6 4-(p-Fluorophenyl)-1,2,3,6-tetrahydropyridine hydrochloride NSC89742 Pyridine, 1,2,3,6-tetrahydro-4-(p-fluorophenyl)-, hydrochloride Pyridine, 4-(4-fluorophenyl)-1,2,3,6-tetrahydro-, hydrochloride