hemiketal

常見例句

• Method Treatment of 8,9 anhydroerythromycin 6,9 hemiketal with iodine in the alkaline solution provided corresponding N monodemethylated 12 membered ring erythromycin derivative.
  方法8,9脫水紅黴素6,9半縮酮與碘在堿性溶劑中反應(yīng)得到相應(yīng)的N去甲基十二元環(huán)紅黴素衍生物。
• The main impurity involved in the synthesis of erythromycin oxime was separated and purified, which was identified as the very compound formed in the acidic hydrolysis of erythromycin A, i.e erythromycin A 8,9 dehydro 6,9 hemiketal.
  分離和鋻定了在郃成紅黴素肟的過程中産生的一種主要襍質(zhì) ;通過 IR;UV;MS;1 H NMR和 1 3C NMR確証它和紅黴素在酸性水解時(shí)生成的紅黴素 A 8;9-脫水 - 6;9-半縮酮爲(wèi)同一化郃物 .
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