Using CC(C)(C)OC(=O)NC(c1ccc(Cl)cc1)c1nnc2n1CCN(C(=O)OC(C)(C)C)C2 to produce NC(c1ccc(Cl)cc1)c1nnc2n1CCNC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.