Using CCOC(=O)C1=C(N(C(C)=O)C(C)=O)Oc2cc(OC(C)=O)ccc2C1c1cnc2ccccc2c1 to produce CCOC(=O)C1=C(NC(C)=O)Oc2cc(O)ccc2C1c1cnc2ccccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.