十一碳烯的

THE FIRST TOTAL SYNTHESIS OF TAXAMAIRIN B Taxamairin B, representive of rare naturally-occuring rearrang-ed 9(10→20)-abeo-8, 11, 13-triene diterpenoids, has been firstsynthesized by a eleven-step route in an overall yield of 8.19%,starting from commercially available catechol and 1,3-cyclohexan-dione. The improved Friedel-Crafts annulation, thermodynamicallycontrolled-geminal pairing methylation, the selective oxidation ofallyl group and the selective reduction of the less-hindrancecarbon-carbon double bond are the key steps.

二。美丽红豆杉素B的全合成研究 1，美丽红豆杉素B的首次全合成以价廉，易得的邻苯二酚和1，3-环己二酮为原料，经过改良的Friedel-Crafts烷基化反应，热力学控制的α，β-不饱和酮结构的α一位双烷基化，烯丙位的选择性氧化，以及选择性还原位阻较小的碳碳双键等十一步反应，以8.19％的总收率首次完成了美丽红豆杉素B的全合成。

This paper reviewed the applications of strong organic base DBU in synthesis of phthalocyanine compounds.

文章介绍了有机碱1，8-二氮杂双环[5.4.0]十一-7-碳烯，作为一种有效的催化剂在酞菁类化合物的合成中的重要作用。

It was concluded that PG not only played an important role in trimer formation but also effected the pigments binding and the energy transfer within the LHCⅡ.

以上实验结果证明，PG及其反式十六碳一烯酸不仅在LHCⅡ三聚体的形成中具重要作用，而且还影响色素分子在LHCⅡ三聚体中的结合状态以及叶绿素b到叶绿素a的正常能量传递。

The result of analysis by GC-MS was shown that fatty acid constituents of oat oil were myristic, palmitic, stearic, oleic, linoleic, linolenic and eicosenoic acids.

通过GC-MS分析，燕麦油的主要成分有豆蔻酸、棕榈酸、硬脂酸、油酸、亚油酸、亚麻酸、二十碳一烯酸。

Our puppy and kitten formulas supply natural DHA through easy-to-digest salmon oil, optimizing your pet's potential for a healthy mind and body.DHA is a natural Omega-3 fatty acid critical for brain and vision development.

为幼犬和幼猫配方供应天然DHA通过易于消化的三文鱼油，提高宠物自身的免疫力，二十二碳六烯酸是一种天然ω- 3脂肪酸可以帮助大脑和视力发育。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。