Using COc1ncncc1C(O)c1cncnc1C(F)(F)F, CC(C)(C)C(=O)Cl to produce COc1ncncc1C(OC(=O)C(C)(C)C)c1cncnc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.