Using NC(=O)c1cc(Br)cc2cc[nH]c12, CC(C)(C)OC(=O)N1CCC(=O)CC1 to produce CC(C)(C)OC(=O)N1CC=C(c2c[nH]c3c(C(N)=O)cc(Br)cc23)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.