Using COC(=O)C(CC(=O)c1cc(OC)ccc1OC)C(C)=O, NCC1CCCCC1 to produce COC(=O)c1cc(-c2cc(OC)ccc2OC)n(CC2CCCCC2)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.