Using COC(=O)C1=C(C)NC2=C(C(=O)CN(Cc3ccccc3)C2)C1c1ccc(F)c(Br)c1 to produce O=C1CN(Cc2ccccc2)CC2=C1C(c1ccc(F)c(Br)c1)C1=C(COC1=O)N2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.