Methyl 2-cyano-3-(difluoromethyl)-5-methoxypyridine-4-carboxylate
4-Cyano-6-(difluoromethyl)-2-methoxypyridine-3-carboxylic acid
3-Cyano-5-(difluoromethyl)-4-methoxypyridine-2-carboxylic acid
5-Cyano-4-(difluoromethyl)-2-methoxypyridine-3-carboxylic acid