(+)-4-(2-{(E)-2-[3-methoxy-4-(4-methyl-1H-imidazol-1-yl)phenyl]vinyl}-5,6-dihydro-8H-[1,2,4]triazolo[5,1-c][1,4]oxazin-8-yl)benzonitrile 生成 (-)-4-(2-{(E)-2-[3-methoxy-4-(4-methyl-1H-imidazol-1-yl)phenyl]vinyl}-5,6-dihydro-8H-[1,2,4]triazolo[5,1-c][1,4]oxazin-8-yl)benzonitrile 、 (+)-4-(2-{(E)-2-[3-methoxy-4-(4-methyl-1H-imidazol-1-yl)phenyl]vinyl}-5,6-dihydro-8H-[1,2,4]triazolo[5,1-c][1,4]oxazin-8-yl)benzonitrile