n.双烯酮...

diketene的音标：diketene的英式发音音标为：[daɪ'ki:tɪn]diketene的美式发音音标为：[daɪ'kitɪn]...

Similarly , using diketene to replace mixed anhydride or acid chloride, intermediate enol 5 may be obtained.而由混合酸酐或双烯酮代替酰氯, 中间体也可能是烯酮或烯醇5....