3,5-Bis(trifluoromethyl)picolinic acid
2,6-Bis(trifluoromethyl)isonicotinic acid
2,3-Bis(trifluoromethyl)-5-(trifluoromethylthio)pyridine
3,4-Bis(trifluoromethyl)-5-(trifluoromethoxy)pyridine
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