A、<p><span lang="EN-US" style="font-size: 10.5pt; font-family: 宋体;">6</span><span style="font-size: 10.5pt; font-family: 宋体;">位酰胺侧链引入强吸电子基团</span></p>
B、<p><span lang="EN-US" style="font-size: 10.5pt; font-family: 宋体;">6</span><span style="font-size: 10.5pt; font-family: 宋体;">位酰胺侧链引入供电子基团</span></p>
C、<p><span lang="EN-US" style="font-size: 10.5pt; font-family: 宋体;">5</span><span style="font-size: 10.5pt; font-family: 宋体;">位引人大的空间位阻</span></p>
D、<p><span lang="EN-US" style="font-size: 10.5pt; font-family: 宋体;">5</span><span style="font-size: 10.5pt; font-family: 宋体;">位引入大的供电基团</span></p>
E、<p><span lang="EN-US" style="font-size: 10.5pt; font-family: 宋体;">6</span><span style="font-size: 10.5pt; font-family: 宋体;">位酰胺侧链引入极性基团</span></p>
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