Using OCCBr, CCOC(=O)c1sc2c(ccc(=O)n2-c2ccc(O)cc2)c1-c1ccccc1 to produce CCOC(=O)c1sc2c(ccc(=O)n2-c2ccc(OCCO)cc2)c1-c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.