title: Structure-activity relationship of a bitter diketopiperazine revisited.
mesh_terms: D006801:Humans; D008465:Mechanoreceptors / Q000502:physiology; D010879:Piperazines; D011487:Protein Conformation; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D013649:Taste
chemical_list: D010879:Piperazines; C032323:cyclo(L-leucyl-L-tryptophyl)