title: OxygenatedTrans-3-olefinic acids in aStenachaenium seed oil.
abstract: Interesting differences were found in oils from two samples ofStenachaenium macrocephalum (Compositae) seed with dissimilar storage histories. One contained significant amounts of epoxy acids (6.5%) and hydroxy conjugated dienoic acids (5.6%), but the other contained no more than 1% of these oxygenated acids. Characterization of components in the former oil established that the principal epoxy acid (4.0%) is the previously unknowncis-9, 10-epoxy-trans-3,cis-12-octadecadienoic acid. The conjugated dienols include two additional new acids with Δ3 unsaturation (2.5%): 9-hydroxy-trans-3,-trans-10,cis-12-octadecatrienoic and 13-hydroxy-trans-3,cis-9,trans-11-octadecatrienoic acoids. The nonoxygenated acids, except for the large amount (40%) oftrans-3,cis-9,cis-12-octadecatrienoic, are those that commonly occur in seed oils.
authors: Northern Regional Research Laboratory, 61604, Peoria, Illinois.
authors: R
authors: R
authors: Kleiman
authors: Northern Regional Research Laboratory, 61604, Peoria, Illinois.
authors: G F
authors: GF
authors: Spencer
authors: Northern Regional Research Laboratory, 61604, Peoria, Illinois.
authors: L W
authors: LW
authors: Tjarks
authors: Northern Regional Research Laboratory, 61604, Peoria, Illinois.
authors: F R
authors: FR
authors: Earle