Using COc1ccc(-c2ccc(-c3ccc(-c4ccccc4)cc3)cc2)cc1 to produce Oc1ccc(-c2ccc(-c3ccc(-c4ccccc4)cc3)cc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.