Using Nc1ccccc1S, CCOC(=O)C(C)(C)Oc1cccc(C=O)c1 to produce CC(C)(Oc1cccc(-c2nc3ccccc3s2)c1)C(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.