pyridine-3-carboxylic acid,sulfuric acid

N,N-diphenylpyridine-3-carboxamide

4-methoxy-6-pyridin-3-ylpyran-2-one

N-pyridin-4-ylpyridine-3-carboxamide

2-Methyl-4H-pyrido[3,2-e][1,3]oxazin-4-one