Ethanone, 1-(3-methyl-1-oxido-2-quinoxalinyl)-

1-(3-Methyl-1-oxido-2-quinoxalinyl)-ethanone is a major metabolite of mequindox (M225118). 1-(3-Methyl-1-oxido-2-quinoxalinyl)-ethanone occurs in chicken muscles, chicken liver, swine muscles and swine liver.