Using CCO, O=C(O)c1ccc(-c2cn3nc(-c4ccc(O)cc4)sc3n2)cc1 to produce CCOC(=O)c1ccc(-c2cn3nc(-c4ccc(O)cc4)sc3n2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.