Using O=C(O)COc1ccc2ccccc2c1, NCc1ccc(C(=O)O)cc1 to produce O=C(COc1ccc2ccccc2c1)NCc1ccc(C(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.