Using CC(=O)Oc1ccc(C(=O)Nc2cc(CCc3ccccc3)ccc2C(=O)O)cc1 to produce O=C(Nc1cc(CCc2ccccc2)ccc1C(=O)O)c1ccc(O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.