Using CC(=O)OC(C)=O, O=C(O)CN1C(=O)C(c2ccc(O)cc2)Sc2ccccc21 to produce CC(=O)Oc1ccc(C2Sc3ccccc3N(CC(=O)O)C2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.