2-{2-[2-(2,4-difluorophenyl)-2-methoximino-1-methyl-ethylideneaminooxy-methyl]-phenyl}-2-methoximino-acetamide 、 trimethoxonium tetrafluoroborate 生成 O-methyl 2-{2-[2-(2,4-difluorophenyl)-2-methoximino-1-methyl-ethylideneaminooxy-methyl]-phenyl}-2-methoximino-acetimidate