Maleic acid COMPOUNDDESCRIPTIONno description SMILES: C(=C/C(=O)[O-])/C(=O)[O-] SMILES: C(=C/C(=O)O)/C(=O)O Your Options: Update the Compound: POST with (required) compoundName and (optional) compoundDescription. Delete the Compound: DELETE.