earticle

영어

Kernel oils of Lindera erythrocarpa seeds had high level of unusual fatty acid. Picolinyl ester of this unknown fatty acid showed molecular ion at m/z = 317 with other diagnostic ions such as m/z = 151, 191 (40 amu between two peaks), 204, and 218 on GC-MS. Characteristic peak at 720 cm-1 appeared in IR spectrum. In 1H-NMR spectrum both methylene protons at C-3 and C-6 resonated ?2.309 at and ?2.012, and methine protons of double bond resonated in lower magnetic field centered at ?5.296 (C-4) and ?5.387 (C-5) as multiplet (J = 9.7Hz). In 13C-NMR, signals at ?22.669 and ?27.048 were due to C-3 and C-6 of ?4-monoenoic acid. Results obtained from spectroscopic measurements confirmed unknown fatty acid as cis-4-tetradecenoic acid (cis-4-C14:1). Main fatty acid components of oils were cis-4-C14:1 (44.5-45.1%), oleic acid (C18:1), 20.4-21.3%), and lauric acid (C12:0, 11.6-12.4%), along with trace amounts of cis-4-C12:1 and cis-4-C16:1.