作者:Neil L.A. Misso、L. John Goad
DOI:10.1016/0031-9422(84)83081-2
日期:1984.1
25 -compound, cyclolaudenol, were recognized. These various Δ 23 - and Δ 25 -sterols may have some importance in alternative biosynthetic routes to the major sterols, particularly the 24β-methylcholest-5-en-3β-ol component of the C 28 -sterols. Radioactivity from both [2- 14 C]MVA and [methyl- 14 C]methionine was incorporated by Z. mays shoots into the sterol mixture. Although 24-methylene and 24-ethylidene
摘要 用薄层色谱、高效液相色谱、气相色谱/质谱联用技术和 1 H 核磁共振技术分离并表征了玉米笋中的甾醇。总共鉴定了 22 种 4-去甲基甾醇,它们包括痕量的 Δ 23 -、Δ 24 - 和Δ 25 - 甾醇、24-甲基胆甾醇-5、E -23-dien-3β-ol、24-甲基胆甾醇- 5, Z -23-dien-3β-ol, 24-methylcholesta-5,25-dien-3β-ol, 24-ethylcholesta-5,25-dien-3β-ol 和 24-ethylcholesta-5,24-dien- 3β-醇。在 4,4-二甲基甾醇级分中,环木蒿醇和 24-亚甲基环木桐醇是主要的甾醇成分,但也发现了少量的 Δ 23 - 化合物环沙多和 Δ 25 - 化合物环月桂醇。这些不同的 Δ 23 - 和 Δ 25 - 甾醇在主要甾醇的替代生物合成途径中可能具有一定的重要性,特别是 C