Using COC(=O)c1cc(Oc2ncc(C(=O)N3CCC3)cc2Cl)cc(OC(CF)CF)c1 to produce O=C(O)c1cc(Oc2ncc(C(=O)N3CCC3)cc2Cl)cc(OC(CF)CF)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.