Using NC(N)=S, O=c1[nH]c(=O)n(CCCCCCBr)c(=O)[nH]1 to produce O=c1[nH]c(=O)n(CCCCCCS)c(=O)[nH]1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.