1,3,6,8-tetra(pyridin-4-yl)pyrene
6-(Difluoromethyl)-4-iodo-3-(trifluoromethoxy)pyridine-2-carboxylic acid
2-Amino-4-(difluoromethyl)-6-nitropyridine-3-carboxaldehyde
3-(Bromomethyl)-5-chloro-4-(difluoromethyl)-2-nitropyridine
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