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