pentafluoropyridine
pentafluoropyridine
2,3,5,6-tetrachloro-4-methylsulfonylpyridine
6-chloropyridine-2-carbonitrile
3,6-difluoropyridine-2-carboxylic acid
2,2'-bipyridine
2-chloro-4'-fluoroacetophenone
2-chloro-2',4'-difluoroacetophenone
2-fluoro-3-nitrobenzoic acid