(R)-(-)-gamma-Ionone - Weak green, fruity, pineapple-like odor with metallic aspects, quite different from the typical ionone odor; however, slightly woody, ionone-type nuances are also present. Odor Threshold = 11 ppb in air = (1'R)-(-)-4-(2',2'-Dimethyl-6'-methylene-cyclohexyl)-but-3-en-2-one  Ref: Elisabetta Brenna, Claudio Fuganti, Stefano Serra, and Philip Kraft, Optically Active Ionones and Derivatives: Preparation and Olfactory Properties, Eur. J. Org. Chem. 2002, 967-978

(S)-(+)-gamma-Ionone - Linear, very pleasant, floral, green, woody odor with a very natural violet tonality; the most powerful and pleasant isomer. Odor Threshold = 0.07 ppb in air = (1'S)-(+)-4-(2',2'-Dimethyl-6'-methylene-cyclohexyl)-but-3-en-2-one  Ref: Elisabetta Brenna, Claudio Fuganti, Stefano Serra, and Philip Kraft, Optically Active Ionones and Derivatives: Preparation and Olfactory Properties, Eur. J. Org. Chem. 2002, 967-978

Ionones, Irones, Damascones & Structurally Related Odorants

Acyclics (Alcohols, Esters, Acids, Aldehydes)

Lactones

Sesquiterpenoid Related Odorants