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- Cyclo(L Phe L Pro)were synthesized from L Pheylalanine and L Proline via DCC condesation, Pd/C catalytic hydrogenation and refluxing in methanol. Its structure was elucidated by HREI MS and DEPT NMR. 从L?苯丙氨酸和L?脯氨酸出发，分别保护两种氨基酸的N 端和C端，将N 端保护的L?苯丙氨酸与C端保护的L?脯氨酸经DCC缩合，得直链二肽，再经Pd/C催化氢化，甲醇中回流，得环（L?苯丙?L?脯），结构经HREI?MS、DEPT NMR等波谱证实
- proline derivatives 脯氨酸衍生物
- The chemistry of petroleum and its derivatives. 石油化学石油及其复合物的化学
- London is spelt with a capital L'. London一字中L是大写的。
- Studies on Phloroglucinol Derivatives of Dryopteris fragrans L. 香鳞毛蕨中间苯三酚衍生物的研究。
- Resembling opium or its derivatives in activity. 起鸦片或其衍生物作用的
- Higher derivatives and taylor series. 高阶导数和泰勒级数。
- Derivatives come in two forms: options and futures. 衍生工具有两种：期权和期货。
- My main concern is with the W's and L's. 我关注的是一场比赛的输赢。
- I charge you not to forget what l have said. 我告诫你不要忘记我所说的话。
- The floor was littered with ravel(l)ings. 地板上布满了散线。
- WHY ARE THE LUPANINE DERIVATIVES BITTER? 为什么白金雀儿碱的派生物是苦的?
- The punch level(l)ed him to the ground. 这一拳将他击倒在地。
- How can a scientific category have its derivatives? 科学范畴何以能衍生?
- The soldier level(l)ed his rifle at the target. 士兵举起步枪瞄准靶子。
- Containing opium or any of its derivatives. 含鸦片或其衍生物的
- George travel(l)ed all over Europe last summer. 乔治在去年夏天游遍了欧洲。
- Any of several derivatives of this compound. 此类化合物的各种衍生物
- He libel(l)ed against her character in an article. 他在一篇文章中诽谤她的人格。
- Any of various derivatives of this compound. 吲哚类产品任何一种由这种化合物制造出来的产品
