adj.违背自然的；强迫的
Nonnatural amino acid 3-(4-thiazolyl)-D,L-alanine hydrochloride and its four intermediates were synthesized, their structures were detenmined by IR,NMR,elementary 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。
nonnatural mark of word segmentation 非自然分词标记
Synthesis of Nonnatural Amino Acid 3-(4-Thiazolyl)-D,L-Alanine Hydrochloride 非天然氨基酸3-(4-噻唑基)-D,L-丙氨酸盐酸盐的合成
Cell Adhesion Inhibition by RGD Peptides Linked with a Photoisomerizable Nonnatural Amino Acid 连接光异构化非天然氨基酸的RGD肽抑制细胞的附着
Title： Synthesis of Nonnatural Amino Acid 3-(4-Thiazolyl)-D,L-Alanine Hydrochloride 关键词：合成；非天然氨基酸；3-(4噻唑基)-D，L-丙氨酸盐酸盐
