2,4-Bis(trifluoromethyl)nicotinic acid
2,3-Bis(trifluoromethyl)isonicotinic acid
3,4-Bis(trifluoromethyl)-2-(trifluoromethylthio)pyridine
2,4-Bis(trifluoromethyl)-5-(trifluoromethylthio)pyridine
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