Using CCc1nc2c(F)ccc(OCC(=O)OC)c2c(OC(F)F)c1Cc1ccc(-n2cccn2)cc1 to produce CCc1nc2c(F)ccc(OCC(=O)O)c2c(OC(F)F)c1Cc1ccc(-n2cccn2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.