Using CCN(c1nc(C)cc(N2CCC(O)(c3cccs3)CC2)n1)c1ccc(C(C)C)cc1Br to produce CCN(c1nc(C)cc(N2CC=C(c3cccs3)CC2)n1)c1ccc(C(C)C)cc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.