.alpha.,.beta.-Dichloro-.beta.-formylacrylic acid 2,3-Dichloromaleic aldehyde acid 2-Butenoic acid, 2,3-dichloro-4-oxo-, (Z)- 87-56-9 Acrylic acid, 2,3-dichloro-3-formyl- Dichloromalealdehydic acid Kyselina mukochlorova MUCOCHLORIC ACID Malealdehydic acid, dichloro- NSC15905 WLN: VHYGUYGVQ