Using CCOC(=O)CC(Br)C(=O)c1ccc(Cl)cc1, NC(=S)[S-] to produce CCOC(=O)Cc1sc(S)nc1-c1ccc(Cl)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.