Using COC(=O)COc1cccc(O)c1C(C)=O, CC(=O)Nc1ccc(C=O)cc1 to produce CC(=O)Nc1ccc(C=CC(=O)c2c(O)cccc2OCC(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.