Using NCCNc1ccccc1, COc1ccc(CCNC(=O)CCCCC(=O)O)cc1OC to produce COc1ccc(CCNC(=O)CCCCC(=O)NCCNc2ccccc2)cc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.