Using CI, CCCCN(CC)c1nc(C)nc2c1C(C)(C)C(O)N2c1c(C)cc(C)cc1C to produce CCCCN(CC)c1nc(C)nc2c1C(C)(C)C(OC)N2c1c(C)cc(C)cc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.