These methyketones from when the mold used to ripen such cheese degrade medium-chain length fatty acids, using B-oxidation enzymes to generate Methyketones that are one carbon shorter than their respective precursors fatty acids (รูป 4). The most prominent
Methyketones include 2-pentanone, 2- heptanone, 2-nonanone, and 2-undercanone arising from fatty acids with 6- to 12-carbon chain lengths.