Synthesis of ethyl iso nicotinate using BTEAC (benzyl triethyl ammonium chloride) as phase transfer catalyst was studied.
以BTEAC(苄三乙铵)为相转移催剂合成了烟酸乙酯。
Methyl 1 phenyl Propanone was synthesized with benzene and iso butyryl chloride by using anhydrous aluminium trichloride as catalyst.
由苯与丁酰三铝作催剂的条件下制备苯丙酮。
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ISO standards are not free, and they're not even cheap.
ISO 标准不是免费的， 而且价格也不宜。
And once again, I go online, and I teach myself about ISO and aperture on YouTube.
我再次上网，在 YouTube 上自 ISO 圈。
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划词翻译
详细解释
三乙
铵)为相转移催剂合成了
烟酸乙酯。
三
识百科大全
宜。
ISO 
圈。
