Using CCOC(=O)C(Cc1c[nH]c2c(Cl)cccc12)(NC=O)C(=O)OCC, CI to produce CCOC(=O)C(Cc1cn(C)c2c(Cl)cccc12)(NC=O)C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.