Using CCOC(OCC)c1ccc(C2Nc3cccc4c(=O)[nH]nc(c34)C2c2ccc(F)cc2)cc1 to produce O=Cc1ccc(C2Nc3cccc4c(=O)[nH]nc(c34)C2c2ccc(F)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.