Using C[O-], CCOC(=O)c1nc(S)n(-c2ccccc2)c1C(=O)OCC to produce COC(=O)c1nc(SC)n(-c2ccccc2)c1C(=O)OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.