Using CC(=O)OC[C@H]1O[C@@H](n2cc(CBr)nn2)[C@H](OC(C)=O)[C@@H](OC(C)=O)[C@@H]1OC(C)=O, CCCC[Sn](CCCC)(CCCC)c1ccc(CC)cc1 to produce CCc1ccc(Cc2cn([C@@H]3O[C@H](COC(C)=O)[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]3OC(C)=O)nn2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.