Using O=C1C2=C(CCCC2)C(=O)N1c1ccc(Br)c(O)c1, C=CCN(CC=C)C(=O)C(C)Br to produce C=CCN(CC=C)C(=O)C(C)Oc1cc(N2C(=O)C3=C(CCCC3)C2=O)ccc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.