1773-89-3 5-Norbornene-2,3-dicarboxylic acid, 1,4,5,6,7,7-hexachloro-, dimethyl ester Bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid, 1,4,5,6,7,7-hexachloro-, dimethyl ester Dimethyl chlorendate Dimethyl hexachloroendomethylenetetrahydrophthalate NSC12446