2 6-difluorophenol July 8, 2019 16 32 64 128 2 6 difluorophenylboronic acid 2 6-difluorophenyl 2 6-difluoro phenol 2 6 difluorophenol pka 2 6 difluorophenol cas no 4 bromo 2 6-difluorophenol 3-chloro-2 6 difluorophenol 2 6-difluorobenzonitrile 2 6-difluoro-4-iodopyridine 2 6-difluorobenzenesulfonyl chloride