(1-nitroso-1,2,3,6-tetrahydropyridine); Pyridine, 1,2,3,6-tetrahydro-1-nitroso; 1,2,3,6-Tetrahydro-1-nitrosopyridine; N-Nitroso-1,2,3,6-tetrahydropyridine; N-Nitroso-1,2,5,6-tetrahydropyridine; 1-nitroso-3,6-dihydro-2H-pyridine