英语语法分析

The IR spectra indicate that poly 2 aminopyridine has head to tail structure.

由红外光谱可知，聚- 2 -氨基吡啶具有头-尾相接的结构。

The anti-itch action of Xiehuang Funing Ointment was observed on mice licking response induced by 4-aminopyridine.

采用4-氨基吡啶诱发小鼠舔体反应，观察蟹黄肤宁软膏对小鼠的止痒作用；

Additionally, two new cellulose derivatives were synthesized by reaction of CDC with 2-aminopyridine and 3-aminopyridine, respectively.

另外，以CDC分别与2 -氨基吡啶、3 -氨基吡啶反应合成了两种新型的纤维素衍生物。