Notes: 13(S)-HODE cholesteryl ester was originally extracted from atherosclerotic lesions.{2227} It remains uncertain whether the oxidized fatty acid portion of the molecule results from enzymatic lipoxygenation or from random lipid peroxidation.{1126} 13(S)-HODE cholesteryl ester can be used as a standard for analysis of chiral HODE cholesteryl esters.