Using O=C(Nc1cc(C(=O)c2ccccc2)ccc1C(=O)O)c1ccccc1 to produce O=C(Nc1cc(Cc2ccccc2)ccc1C(=O)O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.