1 2 5 trichlorobenzene July 8, 2019 16 32 64 128 1 2 5 trichlorobenzene point group 5 bromo 1 2 3 trichlorobenzene 5-bromo-1 2 3-trichlorobenzene cas no 1 2 3-trichlorobenzene 1 2 4-trichlorobenzene