(5E)-2-amino-6-fluoro-2-methyl-7-(3-methyl-5-oxo-1,2,4-oxadiazol-4(5H)-yl)-5-heptenoic acid, methyl ester 在
chiral HPLC chromatography 作用下,
以99%的产率得到(2S,5E)-2-amino-6-fluoro-2-methyl-7-(3-methyl-5-oxo-1,2,4-oxadiazol-4(5H)-yl)-5-heptenoic acid, methyl ester