网络例句
奎宁环
- 与 奎宁环 相关的网络例句 [注：此内容来源于网络，仅供参考]
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Six 3,6-dichloropyridazine-derivatized cinchona alkaloid catalysts were synthesized and applied in IFB reaction.
二氢奎宁二聚体2c最差(56%ee)，与环己二酮相比，环戊二酮作为反应原料时，产物的ee值降低。
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Synthesis with carbocyclic compounds, such as cyclodienylsilane, quinic acid and norbornene etc, as starting materials is discussed in detail.
重点介绍了以环二烯基硅烷、奎宁酸、降冰片烯等碳环化合物为原料合成碳环糖的进展。
- 推荐网络例句
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In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.
。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。
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Go down on one's knees;kneel down
屈膝跪下。。。下跪祈祷
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Nusa lembongan : Bali's sister island, coral and sand beaches, crystal clear water, surfing.
Nusa Dua ：豪华度假村，冲浪和潜水，沙滩，水晶般晶莹剔透的水，网络冲浪。