3(R,S)-methoxycarbonyl-3,4-dihydro-2H-1,4-benzoxazine 、 5(S)-tert-butoxycarbonylamino-4(S)-hydroxy-2(R),7,7-trimethyl-8-[3(R,S)-methylcarbonylamino-1,2,3,4-tetrahydroquinolin-1-ylcarbonyl]-octanoic acid (N-butyl)amide 生成 5(S)-Amino-4(S)-hydroxy-2(R),7,7-trimethyl-8-[3(R,S)-methoxycarbonyl-3,4-dihydro-2H-1,4-benzoxazin-4-ylcarbonyl]-octanoic acid (N-butyl)amide