Lipids from Seeds of Artemisia annua and Guizotia abyssinica

The contents and compositions of neutral and polar lipids from seeds of Artemisia annua and neutral lipids from seeds of Guizotia abyssinica were established. The yields of neutral, glyco-, and phospholipids from A. annua were 99.65, 0.25, and 0.10%, respectively. The compositions of their fatty acids (FA) were analyzed by GC and IR and UV spectroscopy. Acid 18:2 dominated ordinary FA in most lipid classes from A. annua. Acids 18:2 and 16:0 dominated neutral lipid classes from G. abyssinica. The isomeric compositions of epoxy-FA and hydroxy-FA from A. annua and G. abyssinica lipids were determined. The principal epoxy-FA contained in lipids from both plants was 9,10-epoxy-18:1(12). The two geometric isomers 13-OH-18:2(cis-9,trans-11) and 13-OH-18:2(trans-9,trans-11) dominated hydroxy-FA in A. annua lipids; the two positional isomers 9-OH-18:2(trans-10,cis-12) and 13-OH-18:2(cis-9,trans-11), G. abyssinica lipids.