Using COCc1nc(-c2ccc(C(F)(F)F)cc2)nc(C2CC2)c1C(=O)OC to produce COCc1nc(-c2ccc(C(F)(F)F)cc2)nc(C2CC2)c1CO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.