9(S)-HpOTrE is a monohydroperoxy PUFA produced by the action of 5-LO on α-linolenic acid. It can be further metabolized to colnelenic acid by a divinyl ether synthase activity found in garlic and potato microsomal fractions. 9(S)-HpOTrE also serves as a substrate for further oxidation by both soybean and potato LOs, resulting in the formation of 9,16-dihydroperoxy acid. The suicide inactivation of LOs when 9(S)-HpOTrE is used as a substrate is thought to occur via formation of an unstable epoxide.