.gamma.-Picoline 1-oxide .gamma.-Picoline N-oxide 1003-67-4 4-Methylpyridine 1-oxide 4-Methylpyridine N-oxide 4-Picoline 1-oxide 4-Picoline N-oxide 4-Picoline, 1-oxide NSC141449 Pyridine, 4-methyl-, 1-oxide