Using CCCC[Sn](CCCC)(CCCC)c1cnccn1, C[C@@H](Oc1cc(Br)cc2ncn(C3CC3)c12)[C@H]1CNC(=O)C1 to produce C[C@@H](Oc1cc(-c2cnccn2)cc2ncn(C3CC3)c12)[C@H]1CNC(=O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.