Using Brc1ccc2cncnc2c1, CCCC[Sn](CCCC)(CCCC)c1cnc(NC(=O)OC(C)(C)C)s1 to produce CC(C)(C)OC(=O)Nc1ncc(-c2ccc3cncnc3c2)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.