Using COC(=O)c1c(F)c(F)c(F)c(F)c1CBr, NC1CCC(=O)NC1=O to produce O=C1CCC(N2Cc3c(F)c(F)c(F)c(F)c3C2=O)C(=O)N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.