β-(methoxy-phenyl-phosphinoyl)-isobutyric acid methyl ester
2-(Methoxy-phenyl-phosphinoylmethyl)-acrylic acid
2-(Hydroxy-phenyl-phosphinoylmethyl)-acrylic acid methyl ester
2-Chloromethyl-3-(hydroxy-phenyl-phosphinoyl)-propionic acid
2-Bromomethyl-3-(hydroxy-phenyl-phosphinoyl)-propionic acid