tetrachlorobenzene trichlorobenzene 2,3,3',4,4',5,5'-Heptachlorobiphenyl 0 KEGG:C18123 395.32300 C12H3Cl7 Clc1cc(cc(Cl)c1Cl)-c1cc(Cl)c(Cl)c(Cl)c1Cl InChI=1S/C12H3Cl7/c13-6-1-4(2-7(14)10(6)17)5-3-8(15)11(18)12(19)9(5)16/h1-3H chebi_ontology PCB 189 CHEBI:81525 CAS:39635-31-9 XUAWBXBYHDRROL-UHFFFAOYSA-N 391.80544 heptachlorobiphenyl