Using CCOC(=O)N1C(=O)c2ccccc2C1=O, CCCCOc1cc(C(N)CC(=O)OC)ccc1OC to produce CCCCOc1cc(C(CC(=O)OC)N2C(=O)c3ccccc3C2=O)ccc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.