trans-4-Carboxymethylenebut-2-en-4-olide COMPOUNDDESCRIPTIONEawag BBD compound c0146 SMILES: C/1=CC(=O)O\C1=C/C(=O)[O-] Your Options: Update the Compound: POST with (required) compoundName and (optional) compoundDescription. Delete the Compound: DELETE.