Using C[S-], COC(=O)C1(NC(=O)OC(C)(C)C)CC1CCOS(C)(=O)=O to produce COC(=O)C1(NC(=O)OC(C)(C)C)CC1CCSC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.