Medicine intermediate N - ethylethylenediamine ( NEED ) was synthesized from acrylamide and ethylamine by addition reaction and Hofmann rearrangement. 以丙烯酰胺为起始原料,经乙胺加成后,再经Hofmann重排两步反应后合成了药物中间体N - 乙基乙二胺 ( NEED ).
I've got airsickness.我晕机了。I ~ m not feeling well. Do you have some tablet for airsickness?我觉得不舒服. 有治晕机的药 吗 ?Have you ever suffered from airsickness before? You're probably airsick.您曾经晕过飞机 吗 ?您可能是晕机....