6-Amino-3-(difluoromethyl)-4-methylpyridine-2-sulfonamide
5-Amino-2-(bromomethyl)-3-(difluoromethyl)pyridine-4-carboxaldehyde
2-Amino-5-(difluoromethyl)-3-methylpyridine-4-sulfonamide
4-Amino-3-(bromomethyl)-2-(difluoromethyl)pyridine-5-carboxaldehyde