Furfural is a colourless to amber-like oily liquid with an almond-like odour.
Benzyl salicylate is a salicylic acid benzyl ester, a chemical compound most frequently used in cosmetics
4-Ketoisophorone has a woody, musty sweet aroma.
Methylthiomethyl butyrate has a metallic fruity odor.
3-Methylvaleric acid has a sour, herbaceous, slightly green odor. This is synthesized from the diethylester of sec-butyl-malonic acid.
4-Methylvaleric Acid has an unpleasant sour and penetrating odor.
