[{2-[8-(3-Benzyloxycarbonylamino-propoxy)-2-oxo-2,9-dihydro-10-oxa-1,3,9-triaza-anthracen-3-yl]-acetyl}-(2-tert-butoxycarbonylamino-ethyl)-amino]-acetic acid ethyl ester 在
lithium hydroxide 作用下,
以
水 为溶剂,
生成 2-[2-[(2-methylpropan-2-yl)oxycarbonylamino]ethyl-[2-[2-oxo-9-[3-(phenylmethoxycarbonylamino)propoxy]-10H-pyrimido[5,4-b][1,4]benzoxazin-3-yl]acetyl]amino]acetic acid