Similar names: 1,3,4-Metheno-1H-cyclobuta[cd]pentalene-2-pentanoic acid, 1,1a,3,3a,4,5,5,5a,5b,6-decachlorooctahydro-2-hydroxy-γ-oxo-, ethyl ester; 1,3,4-Metheno-1H-cyclobuta[cd]pentalene-2-levulinic acid, 1,1a,3,3a,4,5,5,5a,5b,6-decachlorooctahydro-2-hydroxy-, ethyl ester (7CI,8CI); Allied GC 9160; Despirol; Ethyl 1,1a,3,3a,4,5,5a,5b,6-decachlorooctahydro-2-hydroxy-1,3,4-metheno-1H-cyclobuta[cd]pentalene-2-levulinate; GC 9160; General Chemical 9160; General Chemicals 9160; Kelevan