Using OC1(c2ccc(Br)cc2)c2ccccc2C(O)(c2ccc(Br)cc2)c2cc3ccccc3cc21 to produce Brc1ccc(-c2c3ccccc3c(-c3ccc(Br)cc3)c3cc4ccccc4cc23)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.