Using C[O-], CC(C)(C)c1ccc(-c2ccc(-c3ccc(Br)s3)s2)cc1 to produce COc1ccc(-c2ccc(-c3ccc(C)cc3)s2)s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.