2 3 4 5-trichlorophenol July 8, 2019 16 32 64 128 2 4 5-trichlorophenol 2 4 5-trichlorophenoxyacetic 2 4 6-trichlorophenol 2 4 5-trichlorophenol synthesis 2 4 6-trichlorophenol cas