(S)-2-tert-Butoxycarbonylamino-4-{4-[(S)-2-tert-butoxycarbonylamino-2-(2-methoxycarbonyl-ethylcarbamoyl)-ethyl]-5-hydroxy-pyridin-3-yl}-butyric acid tert-butyl ester 在
sodium hydroxide 作用下,
以
1,4-二氧六环 、
水 为溶剂,
生成 4-[(S)-2-tert-Butoxycarbonylamino-2-(2-carboxy-ethylcarbamoyl)-ethyl]-1-((S)-5-tert-butoxycarbonyl-5-tert-butoxycarbonylamino-pentyl)-3-((S)-3-tert-butoxycarbonyl-3-tert-butoxycarbonylamino-propyl)-5-hydroxy-pyridinium; chloride