3-Formylpropanoic acid 3-Formylpropionic acid 4-03-00-01554 (Beilstein Handbook Reference) 4-Oxobutanoic acid 692-29-5 BRN 1745187 Butanoic acid, 4-oxo- (9CI) Butryaldehydic acid Semi-aldehyde succinique [French] Succinaldehydic acid Succinic acid semialdehyde Succinic semialdehyde beta-Formylpropionic acid gamma-Oxybutyric acid