Using CCOC=C(C(=O)OCC)C(=O)OCC, CCSc1ccccc1C(=N)N to produce CCOC(=O)c1cnc(-c2ccccc2SCC)[nH]c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.