Figure 2 - full size

Figure 2.
Figure 2. The chemical structure of KNI-577 (left) and KNI-764 (right). Both inhibitors share the same allophenyl-norstatine scaffold at the P1 position (red) and the same functional groups at the P2 (blue) and P1 positions (green). The only difference is at the P2 position (magenta).