.alpha.,.alpha.'-Dichloroacetone .alpha.,.gamma.-Dichloroacetone 1,3-Dichloro-2-propanone 1,3-Dichloroacetone 2-Propanone, 1,3-dichloro- 534-07-6 Bis(chloromethyl) ketone NSC8745 s-Dichloroacetone sym-Dichloroacetone