Using O=C(CBr)Nc1cccc(-c2cnc3ccccc3n2)c1, CC([O-])=S to produce CC(=O)SCC(=O)Nc1cccc(-c2cnc3ccccc3n2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.