Using CCOC(=O)C(Cc1ccc(C(C)C(O)(c2ccnc(Cl)c2)C(F)(F)F)c(Cl)c1)C(=O)OCC to produce CCOC(=O)CCc1ccc(C(C)C(O)(c2ccnc(Cl)c2)C(F)(F)F)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.