L-Proline - smell of "semen", "sperm", and "chlorine" (panelists spontaneous comments) for both D- & L-proline Odor Detection Threshold = 100 mM/L = 11513 ppm Taste Detection Threshold = 15.1 mM/L = 1738 ppm = (-)-(2S)-pyrrolidine-2-carboxylic acid Ref: Matthias Laska, Olfactory Perception of 6 Amino Acids by Human Subjects, Chemical Senses, Advance Access published February 26, 2010; Taste thresholds quoted from Schiffman SS, Sennewald K, Gagnon J. Comparison of taste qualities and thresholds of D- and L-amino acids. Physiol Behav (1981) 27:51–59

D-Proline - smell of "semen", "sperm", and "chlorine" (panelists spontaneous comments) for both D- & L-proline Odor Detection Threshold = 75 mM/L = 8635 ppm Taste Detection Threshold = 60.4 mM/L = 6954 ppm = (+)-(2R)-pyrrolidine-2-carboxylic acid Ref: Matthias Laska, Olfactory Perception of 6 Amino Acids by Human Subjects, Chemical Senses, Advance Access published February 26, 2010; Taste thresholds quoted from Schiffman SS, Sennewald K, Gagnon J. Comparison of taste qualities and thresholds of D- and L-amino acids. Physiol Behav (1981) 27:51–59

Ionones, Irones, Damascones & Structurally Related Odorants

Acyclics (Alcohols, Esters, Acids, Aldehydes)

Lactones

Sesquiterpenoid Related Odorants