9-Bromo-2-hydroxy-7-methylpyrido[1,2-a]pyrimidin-4-one
6-Iodo-2-(trimethylsilyl)furo[3,2-b]pyridine
4-Fluoro-6-methoxy-1H-pyrrolo[2,3-b]pyridine
4-Nitropyridine-2,6-dicarboxylic acid
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