Using CC(=O)c1oc2c(-c3ccn(C(=O)OC(C)(C)C)c3)cc(F)cc2c1Cc1cccc(F)c1 to produce CC(=O)c1oc2c(C3CCN(C(=O)OC(C)(C)C)C3)cc(F)cc2c1Cc1cccc(F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.