1,2,3,4-TETRACHLORO-7,7-DIMETHOXY-5-PHENYL-BICYCLO(2.2.1)HEPTA-2,5-DIENE

2,2,4,5-tetrachlorocyclopent-4-ene-1,3-dione

3,4,5-trichlorocyclopent-3-ene-1,2-dione

methyl 2,3,4-trichlorobenzoate

(5E)-3a-chloro-5-(chloromethylidene)-4,4-dimethoxy-6a-methyl-6H-cyclopenta[c]pyrrole-1,3-dione