Using COC(=O)C1(NC(=O)OC(C)(C)C)CCc2c(F)cc(F)cc21 to produce CC(C)(C)OC(=O)NC1(CO)CCc2c(F)cc(F)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.