2-amino-4-[hydroxy(methyl)phosphoryl]butanoic acid glufosinate-P (S)-phosphinothricin 4-[hydroxy(methyl)phosphinoyl]-L-homoalanine phosphinothricin-P L-glufosinate (S)-glufosinate (2S)-2-amino-4-(hydroxymethylphosphinyl)butanoic acid (2S)-2-amino-4-[hydroxy(methyl)phosphinoyl]butyric acid (2S)-glufosinate (+)-glufosinate A 2-amino-4-[hydroxy(methyl)phosphoryl]butanoic acid that has <i>S</i> configuration at position 2. A glutamine synthetase inhibitor, it is used (generally as the corresponding ammonium or sodium salts, known as glufosinate-P-ammonium and glufosinate-P-sodium, respectively) as a herbicide to control annual weeds and grasses. (2S)-2-amino-4-[hydroxy(methyl)phosphoryl]butanoic acid (2S)-2-amino-4-[hydroxy(methyl)phosphoryl]butanoic acid (2S)-2-amino-4-[hydroxy(methyl)phosphinoyl]butyric acid (2R)-glufosinate glufosinate-P zwitterion EC 6.3.1.2 (glutamate--ammonia ligase) inhibitor herbicide agrochemical