Using CCCC[SnH](CCCC)CCCC, CC(=O)N1CCC(=O)CC1 to produce CCCC[Sn](CCCC)(CCCC)C1(O)CCN(C(C)=O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.