attempts to induce the sexual response by using the other l-amino acids , various analogs of glutamic acid , compounds of similar structure ( e.g. , gamma-aminobutyric acid ) , and intermediates of biochemical pathways known to involve l-glutamic acid ( e.g. , alpha-ketoglutarate or pyroglutamic acid ) have been unsuccessful .
C0002520
amino acids
C0061472
l-glutamic acid