Using O=C(O)c1ccc2[nH]ccc2c1, CCCC(=O)C1(c2ccccc2)CCNCC1 to produce CCCC(=O)C1(c2ccccc2)CCN(C(=O)c2ccc3[nH]ccc3c2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.