9(S)-HODE-d4 is intended for use as an internal standard for the quantification of 9-HODE by GC- or LC-MS. (±)-9-HODE is formed via non-enzymatic oxidation of linoleic acid (Item Nos. 90150 | 90150.1 | 21909). 9(S)-HODE and 9(R)-HODE are formed by lipoxygenase- and cyclooxygenase-mediated oxidation of linoleic acid, respectively.
