Using COC(=O)CN(CC(c1ccccc1Cl)c1cc(Cl)ccc1NCC(C)(C)C)C(=O)C(F)(F)F to produce COC(=O)CNCC(c1ccccc1Cl)c1cc(Cl)ccc1NCC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.