Using COC(=O)c1ccc(C)nc1N1CC(c2nc3cc(Cl)ccc3[nH]2)C1 to produce O=C(O)c1cccnc1N1CC(c2nc3cc(Cl)ccc3[nH]2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.