In some embodiments, this invention pertains to active esters of N-substituted piperazine acetic acid, including isotopically enriched versions thereof. In some embodiments, this invention pertains to methods for the preparation of active esters of N-substituted piperazine acetic acid, including isotopically enriched versions thereof.
在某些实施例中,这项发明涉及N-取代
哌嗪乙酸的活性酯,包括其同位素富集版本。在某些实施例中,这项发明涉及制备N-取代
哌嗪乙酸活性酯的方法,包括其同位素富集版本。