Identification of diacylglycerol and triacylglycerol containing 11,12,13-trihydroxy-9,14-octadecadienoic acid in castor oil.
Castor oil has many industrial uses. Molecular species of acylglycerols containing monohydroxy, dihydroxy and trihydroxy fatty acids in castor oil have been reported. We report here the identification of acylglycerols containing a triOH18:2 fatty acid in castor oil. The structure of this novel fatty acid was proposed as 11,12,13-trihydroxy-9,14-octadecadienoic acid by the mass spectrometry of the lithiated adducts of acylglycerols in the HPLC fractions of castor oil. The fragmentation pathways of the lithiated adduct of 11,12,13-trihydroxy-9,14-octadecadienoic acid were proposed. We also proposed the biosynthetic pathways of polyhydroxy fatty acids in castor.
Lin
Jiann-Tsyh
JT
Western Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 800 Buchanan Street, Albany, CA 94710, USA. jiann.lin@ars.usda.gov
Chen
Grace Q
GQ
D002368:Castor Oil / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004075:Diglycerides / Q000737:chemistry*; D005231:Fatty Acids, Unsaturated / Q000737:chemistry*; D015394:Molecular Structure; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods; D014280:Triglycerides / Q000737:chemistry*
D004075:Diglycerides; D005231:Fatty Acids, Unsaturated; D014280:Triglycerides; C027369:octadecadienoic acid; D002368:Castor Oil