(R)-Celery Ketone - Celery leaves, arnica, jasmone, slightly reminiscent of everlastings and fenugreek Odor Threshold = 9.1-1 ng/L (air) The enantiomers of celery ketone differ as strikingly in their olfactory properties as in the rare case of carvone. Only the stronger (R)-enantiomer (odor threshold 9.1-1 ng/L air) is responsible for the characteristic celery note of the racemate, whereas the (S)-enantiomer, which is five times weaker (odor threshold 45.5-1 ng/L air), has an aniseed-like liquorice smell with minty facets. Ref: Jian Zhou, Vijay Wakchaure, Philip Kraft, and Benjamin List, Primary-Amine-Catalyzed Enantioselective Intramolecular Aldolizations, Angew. Chem. Int. Ed. 2008, 47, 7656 –7658.Angew. Chem. Int. Ed. 2008, 47, 7656 –7658

(S)-Celery Ketone - Herbaceous (liquorice, anisic and fennel), slightly woody, minty and pulegone-like Odor threshold = 45.5-1 ng/L (air) The enantiomers of celery ketone differ as strikingly in their olfactory properties as in the rare case of carvone. Only the stronger (R)-enantiomer (odor threshold 9.1-1 ng/L air) is responsible for the characteristic celery note of the racemate, whereas the (S)-enantiomer, which is five times weaker (odor threshold 45.5-1 ng/L air), has an aniseed-like liquorice smell with minty facets. Ref: Jian Zhou, Vijay Wakchaure, Philip Kraft, and Benjamin List, Primary-Amine-Catalyzed Enantioselective Intramolecular Aldolizations, Angew. Chem. Int. Ed. 2008, 47, 7656 –7658.Angew. Chem. Int. Ed. 2008, 47, 7656 –7658

Ionones, Irones, Damascones & Structurally Related Odorants

Acyclics (Alcohols, Esters, Acids, Aldehydes)

Lactones

Sesquiterpenoid Related Odorants