英语语法分析

The levo-benzhydryl piperazine derivative is expected to become a long-acting effective medicine.

左二苯甲基哌嗪有望成为一种长期有效的药物。

Piperazine is a familiar intermediate.

哌嗪是常见的中间体。

The market prospects of piperazine is analyzed also.

分析了哌嗪的市场前景。