4,8-Dichloropyrido[3,4-d]pyrimidine
7-Bromo-1,2-dihydropyrido[2,3-b]pyrazin-3(4H)-one
7-Cyano-1H-pyrrolo[3,2-b]pyridine-3-carboxylic acid
2,4,7-Trichloropyrido[2,3-d]pyrimidine
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