Chlordecone

Formula : C10-Cl10-O
CAS : 143-50-0 

A highly chlorinated polycyclic hydrocarbon insecticide whose large number of chlorine atoms makes it resistant to degradation. It has been shown to be toxic to mammals and causes abnormal cellular changes in laboratory animals.

Chlordecone alcohol

Formula : C10-H2-Cl10-O
CAS : 1034-41-9 

Metabolite of kepone in humans; present in bile as its glucuronide conjugate.