Synonyms: 1,4-Methanonaphthalene-6,7-dicarboxylicanhydride, 1,2,3,4,9,9-hexachloro-1,4,4a,5,6,7,8,8a-octahydro- (7CI,8CI);1,2,3,4,9,9-Hexachloro-1,4,4a,5,6,7,8,8a-octahydro-1,4-methanonaphthalene-6,7-dicarboxylicanhydride;2,3-Dicarboxy-5,8-endomethylene-5,6,7,8,9,9-hexachloro-1,2,3,4,4a,5,8,8a-octahydronaphthaleneanhydride;5,6,7,8,9,9-Hexachloro-1,2,3,4,4a,5,8,8a-octahydro-5,8-methano-2,3-naphthalenedicarboxylicanhydride; Chloran; Cloran; Hexolic anhydride; NSC 100757