ic50: 2.4 μm (sirt2)

SirReal1-O-propargyl, a moiety based on SirReal1, is a selective and highly potent inhibitor of Sirtuin 2 (Sirt2), demonstrating an IC50 of 2.4 μM. It operates by binding to the cereblon ligand through a linker, facilitating the formation of PROTAC for the degradation of Sirt2[1].

Sirt1 2-IN-2 (compound hsa55) is a dual inhibitor, targeting SIRT1 with an IC50 of 1.8 μM and SIRT2 with an IC50 of 2.4 μM. It effectively inhibits p53 deacetylation while enhancing the acetylation of p53 and α-tubulin, promoting apoptosis and exhibiting anti-proliferative effects on human leukemia cell lines [1].