选用N, N -二甲基乙酰胺作为反应溶剂后缩短反应时间的同时，得到的盖草能收率高，光学纯度好。
The n, N-dimethyl acetamide is used as the reaction solvent, therefore, the reaction time is shortened, and simultaneously, the obtained Gallant-Super has high yield rate and good optical purity.
异丙甲草胺和乙草胺均属氯代乙酰胺类除草剂，它们在水田中活性极高。
Metolachlor and acetochlor are belong to acetanilide herbicides, they have high activity in rice field.
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