Dimethyl 5-norbornene-2,3-dicarboxylate5826-73-331 % similar 3-Methylpentan-2-one565-61-730 % similar 3-Chloro-2,4-pentanedione1694-29-730 % similar 1,1-Difluoro-2-propanone431-05-030 % similar 1,1-Dichloroacetone513-88-230 % similar