Using Cc1ccccc1, COc1cccc(Oc2ccccc2-c2c(O)on(C)c2=O)c1 to produce COc1cccc(Oc2ccccc2-c2c(OC)on(C)c2=O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.