Using CCCC[Sn](CCCC)(CCCC)c1ccnc(C)c1, COc1cc(CC(=O)O)ccc1OS(=O)(=O)C(F)(F)F to produce COc1cc(CC(=O)O)ccc1-c1ccnc(C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.