Using COC(=O)c1ccc(-c2ccc(-c3ccc(C(=O)OC)[nH]3)s2)[nH]1 to produce O=C(O)c1ccc(-c2ccc(-c3ccc(C(=O)O)[nH]3)s2)[nH]1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.