4-Chloro-6-cyano-2-nitro-3-(trifluoromethoxy)pyridine
3-Bromo-5-(difluoromethyl)-6-(trifluoromethoxy)pyridine-2-acetic acid
5-Chloro-3-cyano-2-nitro-4-(trifluoromethoxy)pyridine
3-Bromo-4-(difluoromethyl)-6-(trifluoromethoxy)pyridine-2-acetic acid
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