Using CCCC[Sn](/C=C/CNC(=O)OC(C)(C)C)(CCCC)CCCC, Nc1ncc(I)c2scc(Br)c12 to produce CC(C)(C)OC(=O)NC/C=C/c1cnc(N)c2c(Br)csc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.