173469-87-9 2-(3-Methoxy-2-phenylchromon-6-yl)butanoic acid 4H-1-Benzopyran-6-acetic acid, alpha-ethyl-3-methoxy-4-oxo-2-phenyl- alpha-Ethyl-3-methoxy-4-oxo-2-phenyl-4H-1-benzopyran-6-acetic acid