.beta.-Picoline 1-oxide .beta.-Picoline N-oxide 1003-73-2 3-Methylpyridine 1-oxide 3-Methylpyridine N-oxide 3-Picoline 1-oxide 3-Picoline N-oxide 3-Picoline, 1-oxide NSC18254 Pyridine, 3-methyl-, 1-oxide