Using CC(C)(C)OC(=O)n1cc(CO)c2cccnc21, ClC(Cl)(Cl)Cl to produce CC(C)(C)OC(=O)n1cc(CCl)c2cccnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.