Ethyl 2-(2,3-difluorophenyl)-5-fluoronicotinate
Ethyl 5-(2,3-difluorophenyl)-2-fluoroisonicotinate
Ethyl 3-(2,3-difluorophenyl)-5-fluoroisonicotinate
Ethyl 3-(2,3-difluorophenyl)-2-fluoroisonicotinate
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