2-Cyclobuten-1-one, 2,3,4,4-tetrachloro- 3200-96-2 NSC125696 Perchloro-2-cyclobuten-1-one Perchloro-2-cyclobutene-1-one Perchlorocyclobut-2-enone Perchlorocyclobutenone WLN: L4V BHJ BG BG CG DG