(2S)-2-azaniumyl-4-hydroxypentanedioate (2S)-2-azaniumyl-4-hydroxy-pentanedioate (2S)-2-ammonio-4-hydroxypentanedioate (2S)-2-ammonio-4-hydroxy-glutarate 4-hydroxy-L-glutamate(1-) CHEBI:32812 hydrogen 4-hydroxy-L-glutamate