Using CC(=O)OC(C)=O, COc1cc2c(=O)[nH]cnc2cc1OCc1ccccc1 to produce COc1cc2c(=O)[nH]cnc2cc1OC(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.