Using O=C(CBr)c1cc(F)cc(F)c1, CCC(N)(CC)C(=O)OC to produce CCC(CC)(NCC(=O)c1cc(F)cc(F)c1)C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.