(E)-4-Methoxy-6-(2-phenylethenyl)-2H-pyran-2-one 15345-89-8 26531-51-1 2H-Pyran-2-one, 4-methoxy-6-(2-phenylethenyl)-, (E)- (9CI) 2H-Pyran-2-one, 4-methoxy-6-styryl-, (E)- 4-Methoxy-6-styryl-2H-pyran-2-one DMY Demethoxyyangonin Desmethoxyyangonin NSC 112161