单词	Knoevenagel reaction
释义	Knoevenagel reaction noun Knoe·​ve·​na·​gel reaction kəˈnə(r)vəˌnāgəl-, kəˈnə̄v- variants or Knoevenagel condensation : an aldol-type condensation catalyzed by amines that takes place between an aldehyde or ketone and a compound containing an active methylene group (as in esters of acetoacetic acid, malonic acid, or cyanoacetic acid) Word History Etymology after Emil Knoevenagel †1921 German chemist
随便看	Beckmann thermometer Beckmesser beckon beckoned beckoners beckoning beckoning crab beckoningly beckons becks beclad beclamored beclamoring beclamors beclamour beclamoured beclamouring beclamours beclasped beclasping beclasps beclip becloaked becloaking becloaks

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