2,2-Dimethyl-5-((pyridin-4-ylamino)methylene)-1,3-dioxane-4,6-dione
5-Chloro-2-((diphenylmethylene)hydrazono)-1,2-dihydropyridine
4,6-Dichloro-5-nitro-2-pyridinecarboxylic acid
7-Methoxy-1H-pyrrolo[2,3-c]pyridine-2-carboxylic acid
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