Using COC(=O)c1cnc(Cl)cn1, CC(C)(C)OC(=O)N1CCNCC1 to produce COC(=O)c1cnc(N2CCN(C(=O)OC(C)(C)C)CC2)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.