Using CC(C)(C1CC1)C(O)(Cn1cncn1)c1ccc(Cl)cc1, CI to produce COC(Cn1cncn1)(c1ccc(Cl)cc1)C(C)(C)C1CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.