Methyl 5-(2,3-difluorophenyl)-6-hydroxypicolinate
Methyl 3-(2,3-difluorophenyl)-6-hydroxypicolinate
Methyl 5-(2,3-difluorophenyl)-6-hydroxynicotinate
Methyl 5-(2,3-difluorophenyl)-2-hydroxynicotinate
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