ethyl ({2-cyano-4-[2-({5-hydroxy-2-[(4-methoxybenzylamino)carbonyl]-4-oxo-4H-chromen-7-yl}oxy)ethyl]phenyl}amino)(oxo)acetate 在
lithium hydroxide 作用下,
以
四氢呋喃 为溶剂,
以62%的产率得到[(2-cyano-4-{2-[(5-hydroxy-2-{[(4-methoxyphenyl)methyl]carbamoyl}-4-oxo-4H-chromen-7-yl)oxy]ethyl}phenyl)carbamoyl]formic acid