Using CO[PH](=O)CC(CCc1ccccc1)C(=O)OCc1ccccc1 to produce O=C(OCc1ccccc1)C(CCc1ccccc1)C[PH](=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.