Using COC(=O)C(O)C(OCCNC(=O)OCc1ccccc1)(c1ccccc1)c1ccccc1 to produce O=C(NCCOC(c1ccccc1)(c1ccccc1)C(O)C(=O)O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.