(R)-(+)-4-methylhexanoic acid - stronger than (S)-(-)-isomer, more fatty; GC-O has confirmed both enantiomers to possess acidic, fatty notes, with the (R)-enantiomer being more potent (Dregus et al.). Ref: Mans H. Boelens, Harrie Boelens & Leo J. van Gemert, Perfumer & Flavorist, Vol. 18, No. 6, 1-15, 1993; Ohloff, G. Odorous properties of enantiomeric compounds. In Olfaction and Taste IV, Proceedings of the Fourth International Symposium; Schneider, D., Ed.; Wiss. Verlagsgesellschaft: Stuttgart, Germany, 1972; pp 156-160; Márta Dregus, Hans-Georg Schmarr, Eisuke Takahisa, and Karl-Heinz Engel, J. Agric. Food Chem., 2003, 51 (24), pp 7086–7091

(S)-(-)-4-methylhexanoic acid - caprylic, slightly fatty; GC-O has confirmed both enantiomers to possess acidic, fatty notes, with the (R)-enantiomer being more potent (Dregus et al.). Ref: Mans H. Boelens, Harrie Boelens & Leo J. van Gemert, Perfumer & Flavorist, Vol. 18, No. 6, 1-15, 1993; Ohloff, G. Odorous properties of enantiomeric compounds. In Olfaction and Taste IV, Proceedings of the Fourth International Symposium; Schneider, D., Ed.; Wiss. Verlagsgesellschaft: Stuttgart, Germany, 1972; pp 156-160; Márta Dregus, Hans-Georg Schmarr, Eisuke Takahisa, and Karl-Heinz Engel, J. Agric. Food Chem., 2003, 51 (24), pp 7086–7091

Ionones, Irones, Damascones & Structurally Related Odorants

Acyclics (Alcohols, Esters, Acids, Aldehydes)

Lactones

Sesquiterpenoid Related Odorants