2 4′ 5-trichloro biphenyl July 8, 2019 16 32 64 128 2 4 5-trichlorobiphenyl 2 4 5-trichlorophenol 2 4 5-trichlorophenoxyacetic 2 4 5-trichlorophenoxyacetic acid 2 4-dichloro-5-(trifluoromethyl)pyrimidine