Using CC(C)(C)OC(=O)N1CCCCC1=O, NCC(O)c1ccccn1 to produce CC(C)(C)OC(=O)N1CCC(NCC(O)c2ccccn2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.