Using CC(C)(C)OC(=O)NCC1CCN(CCCN)C1, COc1cc(N)c(Cl)cc1C(=O)O to produce COc1cc(N)c(Cl)cc1C(=O)NCCCN1CCC(CNC(=O)OC(C)(C)C)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.