Using CCOC(=O)C(C(=O)c1ccc(OC)cc1)=P(c1ccccc1)(c1ccccc1)c1ccccc1, O=S([O-])OO to produce CCOC(=O)C(=O)C(=O)c1ccc(OC)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.