2-Picoline, 5-ethyl-, 1-oxide 5-Ethyl-2-methylpyridine 1-oxide 5-Ethyl-2-methylpyridine N-oxide 5-Ethyl-2-methylpyridine-1-oxide 768-44-5 NSC 4252 Pyridine, 5-ethyl-2-methyl-, 1-oxide (9CI)