Physico-chemical analysis of Ximenia americana L. seed oil and structure elucidation of some chemical constituents of its seed oil and fruit pulp

摘要

In this study, fixed oil was extracted from the seeds of?Ximenia americana. The study covered the percentage yield, physical and chemical properties of the extracted oil. The highest oil obtained was 51% w/v. The physical properties of the oil were found to be reactive index (1.477), density (0.9376 g/ml), boiling point (157°C) and viscosity? 42 at 70°C and 227.58 at 25°C. The chemical properties of the oil were : iodine value (47.59), acid value? (0.2805), peroxide value (30), saponification value (11.43), ester value (9.82), and the ratio value (35.009). The molecular weight of the major component of the oil was 604. The major component of the oil (C40H76O3) was identified as methyl-14,14- dimethyl – 18-hydroxy heptatriacont-27,35-dienoate[CH3OCO(CH2)12C(CH3)2(CH2)3CHOH(CH2)8CH=CH(CH2)6CH=CHCH3].?A compound was isolated from the fruit pulp, and purified using column and thin layer chromatography, with a molecular weight of 578, molecular formula (C35H62O6) and was identified as dimethyl - 5-?methyl – 28,29 - dihydroxy dotriacont-3,14,26 - triendioate. These compounds were not reported before from?X. americana?seeds or fruit pulp[CH3OCOCH2CH=CHCH(CH3(CH2)8CH=CH(CH2)10CH=CH(CHOH)2(CH2)2COOCH3].