Medicine intermediate N-ethylethylenediamine(NEED) was synthesized from acrylamide and ethylamine by addition reaction and Hofmann rearrangement.是什么意思_Medicine intermediate N-ethylethylenediamine(NEED) was synthesized from acrylamide and ethylamine by addition reaction and Hofmann rearrangement.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句