Using CCOC(=O)c1cnc2nc(C)c(OCC)cc2c1Nc1ccc(OC)cc1, O=CC(=O)O to produce CCOC(=O)c1cnc2nc(C=CC(=O)O)c(OCC)cc2c1Nc1ccc(OC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.