Each R-group is based on several descriptors, such as electronegativity, hydrogen-bond acceptor, hydrogen-bond donor etc., which will affect reactions obviously and can be calculated conveniently.

• 每个R-基团主要依赖一些对反应影响较为明显，同时又便于计算的结构描述符来进行描述，例如电负性、氢键受体、氢键给体等参数。