The natural product library 1 (see image 1) is made of 1,271 different compounds, based on the alkaloid cytisine, and delivers VE-PTP inhibitors in the low, micromolar range.

天然产物文库1是由基于金雀花碱的1，271个不同的化合物构成的并且能够在微量的，微摩尔级的水平上传送VE-PTP抑制剂（见图1）。