Using CCOC(=O)CBr, Oc1ccc(-c2cn3c(n2)sc2ccccc23)cc1 to produce CCOC(=O)COc1ccc(-c2cn3c(n2)sc2ccccc23)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.