SMILES: C1=CC=C(C=C1)CC(=O)NCC=O
Description: The molecule is degradation product of benzylpenicillin in which the thiolamino acid penicillamine and carbon dioxide from the labile carboxyl group have been lost, leaving a phenylacetylamino-acetaldehyde. It has a role as an allergen. It derives from an acetaldehyde and a phenylacetic acid.