Using Oc1ccc2cc(-c3csc(-c4ccccc4)n3)ccc2c1Br, COC(=O)CBr to produce COC(=O)COc1ccc2cc(-c3csc(-c4ccccc4)n3)ccc2c1Br, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.