Using CCCC[C@@H](NC(=O)c1c(C)nc2c(OCc3c(F)cccc3F)cccn12)C(=O)OC to produce CCCC[C@H](NC(=O)c1c(C)nc2c(OCc3c(F)cccc3F)cccn12)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.