Using O=C(Cl)c1ccccc1, CN1CCN(c2cccc3ccc([Sn](C)(C)C)cc23)CC1 to produce CN1CCN(c2cccc3ccc(C(=O)c4ccccc4)cc23)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.