A、<p><span style="font-size:14px;font-family:宋体">β</span><span style="font-size:14px;font-family:宋体">-</span><span style="font-size: 14px;font-family: 宋体">丙氨酸</span></p>
B、<p><span style="font-size:14px;font-family:宋体">α</span><span style="font-size:14px;font-family:宋体">-</span><span style="font-size: 14px;font-family: 宋体">丙氨酸</span></p>
C、<p><span style="font-size: 10.5pt; font-family: 宋体;">尿素</span></p>
D、<p><span style="font-size: 10.5pt; font-family: 宋体;">尿苷</span></p>
E、<p><span style="font-size: 10.5pt; font-family: 宋体;">尿酸</span></p>