Using CCCCOC(=O)c1nc(Br)c2cc(Sc3ccccc3)ccc2c1O to produce CCCCOC(=O)c1ncc2cc(Sc3ccccc3)ccc2c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.