2,4,6-Metheno-5H-cyclopenta(4,5)pentaleno(1,2-b)oxiren-5-one, 2a,3,3,4,5a-pentachlorodecahydro-, (1aalpha,1bbeta,2alpha,2abeta,4beta,5abeta,5beta,6alpha,6aalpha)- 21038-08-4 21038-31-3 23745-79-1 29447-21-0 54482-95-0 Ketodieldrin