AbstractThe seed oil ofSantalum spicatum contains a significant amount of ximenynic acid,trans‐11‐octadecen‐9‐ynoic acid, a long‐chain acetylenic fatty acid, as a major component (34%). The identity oftrans‐ximenynic acid was confirmed after isolation by ultraviolet, infrared, and nuclear magnetic resonance (NMR) (1H‐ and13C‐) spectroscopy and by gas chromatography/mass spectrometry (GC/MS). Thecis isomer of ximenynic acid was also found (<1%) in some samples. Thecis andtrans isomers were characterized by GC/MS comparison of their methyl esters and 4,4‐dimethyloxazoline derivatives.
摘要刺五加的种子油中含有大量的西门宁酸(反式-11-十八烯-9-炔酸),这是一种长链乙炔脂肪酸,是其主要成分(34%)。经紫外线、红外线和核磁共振(NMR)(1H- 和 13C-)光谱以及气相色谱/质谱法(GC/MS)分离后,确认了反式-西门宁酸的身份。在一些样品中还发现了西门酸的顺式异构体(<1%)。通过对其甲酯和 4,4-二甲基噁唑啉衍生物进行气相色谱/质谱比较,确定了顺式和反式异构体的特征。