Ethyl 2-[4-[7-[4-[[(2-methylpropan-2-yl)oxycarbonylamino]methyl]benzoyl]cyclopenta[d]oxazin-4-yl]phenoxy]acetate 在
lithium hydroxide 作用下,
以
四氢呋喃 、
甲醇 为溶剂,
生成 2-[4-[7-[4-[[(2-Methylpropan-2-yl)oxycarbonylamino]methyl]benzoyl]cyclopenta[d]oxazin-4-yl]phenoxy]acetic acid