Using O=S1(=O)CCN(c2cc(Cl)c3cc(O)ccc3n2)Cc2ccccc21, OCCBr to produce O=S1(=O)CCN(c2cc(Cl)c3cc(OCCO)ccc3n2)Cc2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.