Using CC(C)(C)OC(=O)N1CCC2(CC1)CN(CC(F)F)CC(c1ncco1)O2 to produce FC(F)CN1CC(c2ncco2)OC2(CCNCC2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.