Using CCOC(=O)CCC1=C2C(=CC(Cl)=CC2(F)Cl)NC1C(=O)OCC to produce O=C(O)CCC1=C2C(=CC(Cl)=CC2(F)Cl)NC1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.