Ethyl 2-(2,3-difluorophenyl)-5-(trifluoromethyl)nicotinate
Ethyl 2-(2,3-difluorophenyl)-4-(trifluoromethyl)nicotinate
Ethyl 3-(2,3-difluorophenyl)-2-(trifluoromethyl)isonicotinate
Ethyl 2-(2,3-difluorophenyl)-6-(trifluoromethyl)isonicotinate
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