Using COC(=O)Cc1ccnc(Cl)c1, CCCC[Sn](CCCC)(CCCC)c1ccnc(C)c1 to produce COC(=O)Cc1ccnc(-c2ccnc(C)c2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.