Esuoso K O, Lutz H, Bayer E, Kutubuddin M
Department of Chemistry, University of Ibadan, Ibadan, Nigeria, and Institute of Organic Chemistry, Research Centre for Nucleic Acid and Peptide Chemistry, University of Tuebingen, 72076 Tuebingen, Germany.
J Agric Food Chem. 2000 Feb;48(2):231-4. doi: 10.1021/jf9908493.
Sterols, triterpene alcohols, and hydrocarbons present in the unsaponifiable fraction of some underutilized tropical seed oils have been examined. The seeds include Telfairia occidentalis (TLO), Andenopus breviflorus (ADB), Cucumeropsis edulis (CME), Antiaris africana (ATF), and Monodora tenuifolia (MNT). The oil content of the seeds was high (34.7-68.8%), whereas triacylglycerols comprised the dominant lipid group in the oils (65.4-73.9%). The percentage of unsaponifiables ranged from 1.1 to 7.9%. Ten sterols were identified in the fractions. In the Cucurbitaceae oils (TLO, CME, and ADB), Delta(7)-sterols constituted the dominant sterols. These include 24-ethylcholesta-7,22E,25-trienol (7), 24-ethylcholesta-7,25-dienol (9), 24Z-ethylidenecholes-7-enol (10), and 24-ethylcholesta-7, 24-dienol (11). However Delta(5)-sterols (1-5) occurred at the highest concentration in the other two samples (ATF and MNT). Fifteeen triterpene alcohols were detected in the fractions. Olean-12-enol (16), isomultiflorenol (8), and lupeol (23) were the dominant alcohols in the Cucurbitaceae family, whereas alpha-amyrin (urs-12-enol) (20) was the dominant triterpene alcohol in ATF and MNT. A mixture of C(18)-C(34) n-alkanes, squalene, and some monoterpenes was detected in the hydrocarbon fraction.
对一些未充分利用的热带种子油不皂化物部分中的甾醇、三萜醇和碳氢化合物进行了研究。这些种子包括西非油瓜（TLO）、短花安第斯瓜（ADB）、可食黄瓜瓜（CME）、非洲箭毒木（ATF）和薄叶蒙多果（MNT）。种子含油量很高（34.7 - 68.8%），而三酰甘油是油中主要的脂质类别（65.4 - 73.9%）。不皂化物的百分比在1.1%至7.9%之间。在这些馏分中鉴定出了10种甾醇。在葫芦科油（TLO、CME和ADB）中，Δ⁷ - 甾醇是主要的甾醇。这些包括24 - 乙基胆甾 - 7,22E,25 - 三烯醇（7）、24 - 乙基胆甾 - 7,25 - 二烯醇（9）、24Z - 亚乙基胆甾 - 7 - 烯醇（10）和24 - 乙基胆甾 - 7,24 - 二烯醇（11）。然而，Δ⁵ - 甾醇（1 - 5）在其他两个样品（ATF和MNT）中浓度最高。在这些馏分中检测到了15种三萜醇。齐墩果 - 12 - 烯醇（16）、异多花素醇（8）和羽扇豆醇（23）是葫芦科中的主要醇类，而α - 香树脂醇（乌苏 - 12 - 烯醇）（20）是ATF和MNT中的主要三萜醇。在碳氢化合物馏分中检测到了C₁₈ - C₃₄正构烷烃、角鲨烯和一些单萜的混合物。
