英语语法分析

Nonnatural amino acid 3 (4 thiazolyl) D, L alanine hydrochloride and its four intermediates were synthesized.

合成了非天然氨基酸3（4噻唑基）D，L丙氨酸盐酸盐及其四个中间体。

Nonnatural amino acid 3 (4 thiazolyl) D, L alanine hydrochloride and its four intermediates were synthesized, their structures were detenmined by IR, NMR, ele we are pirates, these data are stolen from youdao ary analysis and melting point.

合成了非天然氨基酸3- （ 4 -噻唑基） - D，L -丙氨酸盐酸盐以及三个中间体，其结构分别通过红外光谱、核磁共振、元素分析、熔点等测试手段得到确证。