2-Butyne-1,4 bis(2,3,6-trichlorobenzoate) 2-Butyne-1,4-diol, bis(2,3,6-trichlorobenzoate) 73758-47-1 Benzoic acid, 2,3,6-trichloro-, 2-butyne-1,4-diyl ester (9CI) NSC 190400