Using C=C(OCC)[Sn](CCCC)(CCCC)CCCC, CCOc1cc(Br)cc(C(C)(C)C)c1OCOC to produce CCOc1cc(C(C)=O)cc(C(C)(C)C)c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.