Using CC(=O)c1ccc(Br)s1, CCCC[Sn](CCCC)(CCCC)c1cnc(Oc2ccc(Oc3ccccc3)cc2)s1 to produce CC(=O)c1ccc(-c2cnc(Oc3ccc(OC(C)C)cc3)s2)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.