英语语法分析

Objective To synthesize 5-methyl-4-isoxazole carboxylic acid (IV).

目的合成5 - 甲基- 4 -异唑甲酸（IV）。

Many isoxazole heterocycle compounds have efficiency or super-efficiency in controlling the growth of weeds.

异恶唑杂环化合物在专利报道中出现许多高效或超高效的新品种。