Using CCCC[Sn](CCCC)(CCCC)c1ncco1, CCCN(CCC)[C@@H]1Cc2c(I)ccc3c2[C@@H](C1)CN3C(=O)c1ccccc1 to produce CCCN(CCC)[C@@H]1Cc2c(-c3ncco3)ccc3c2[C@@H](C1)CN3C(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.