... active method 主动法 active methylene group 活性亚甲基 active microflora 活性微生物区; 活跃的微生物区系 ...
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柯达叙述了一种直链的活性亚甲基两当量的黄成色剂。
Kodak company describes open chain reactive methylene two-equivalent yellow-forming conplers.
柯达叙述了一种直链的活性亚甲基两当量的黄成色剂。
Kodak company describes open chain reactive methylene two - equivalent yellow - forming conplers.
西司他丁钠的合成以乙酰乙酸乙酯和1-溴-5-氯戊烷为原料，经活性亚甲基烃化、成肟和水解3步反应得7-氯-2-氧庚酸乙酯；
The synthesis of Cilastatin sodium started from ethyl acetoacetate and 1-bromo-5-chloropentane, through 3 steps to produce ethyl 7-chloro-2-oxoheptanoate;
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