Using Cc1ccc(NC(=O)c2cccc(C(C)(C)C#N)c2)cc1NC(=O)c1sc2nccnc2c1Br, C=C[Sn](CCCC)(CCCC)CCCC to produce C=Cc1c(C(=O)Nc2cc(NC(=O)c3cccc(C(C)(C)C#N)c3)ccc2C)sc2nccnc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.