Using CC(C)(C)OC(=O)N(C(=O)OC(C)(C)C)c1cnc(CCOS(C)(=O)=O)cn1, C[S-] to produce CSCCc1cnc(NC(=O)OC(C)(C)C)cn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.