Using CN(CCC=O)C(=O)OC(C)(C)C, CCCC[Sn](CCCC)(CCCC)c1ncccn1 to produce CN(CCC(O)c1ncccn1)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.