Using CCOC(=O)CS, CCOC(=O)c1c(-c2ccccc2)nc(SC)[nH]c1=O to produce CCOC(=O)c1sc2nc(SC)nc(-c3ccccc3)c2c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.