1,2,5,6-Tetrahydro-1-butyl-4-phenylpyridine hydrochloride 1-Butyl-4-phenyl-1,2,5,6-tetrahydropyridine hydrochloride NU-853 Pyridine, 1,2,5,6-tetrahydro-1-butyl-4-phenyl-, hydrochloride UT8237000