3-(1-benzothiophen-2-ylmethylamino)-5-ethyl-6-methyl-1H-pyridin-2-one

5-ethyl-3-(furo[3,2-c]pyridin-2-ylmethylamino)-6-methyl-1H-pyridin-2-one

5-ethyl-6-methyl-3-([1,3]oxazolo[4,5-b]pyridin-2-ylmethylamino)-1H-pyridin-2-one

5-ethyl-6-methyl-3-(4,5,6,7-tetrahydro-1,3-benzoxazol-2-ylmethylamino)-1H-pyridin-2-one

3-(benzo[e][1,3]benzoxazol-2-ylmethylamino)-5-ethyl-6-methyl-1H-pyridin-2-one