Inversion of the original stereocenter via an efficient intramolecular SN2 amination affords the piperidine core of IS811, a potent CCR3 antagonist.是什么意思_Inversion of the original stereocenter via an efficient intramolecular SN2 amination affords the piperidine core of IS811, a potent CCR3 antagonist.在线翻译_英语_读音_用法_例句