1-Chloro-4-pentanone 2-Pentanone 5-chloro- 2-Pentanone, 5-chloro- 3-Chloropropyl methyl ketone 5-Chloro-2-pentanone 5-Chloropentan-2-one 5891-21-4 AI3-08709 EINECS 227-565-8 NSC 60210 NSC 8427