rac-6-[2(2,2-Dimethylpropyl)-2-hydroxy-4-(4-methylphenyl)but-3-ynoylamino]-4-methyl-2,3-benzoxazin-1-one 生成 (R)-6-[2-(2,2-dimethylpropyl)-2-hydroxy-4-(4-methylphenyl)but-3-ynoylamino]-4-methyl-2,3-benzoxazin-1-one 、 (S)-6-[2-(2,2-dimethylpropyl)-2-hydroxy-4-(4-methylphenyl)but-3-ynoylamino]-4-methyl-2,3-benzoxazin-1-one