Using COc1cc(C)c2c(ccn2C(=O)OC(C)(C)C)c1C(O)C(F)(F)F to produce COc1cc(C)c2c(ccn2C(=O)OC(C)(C)C)c1C(=O)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.