EX-527 is a potent and selective SIRT1 inhibitor with IC50 of 38 nM, exhibits > 200-fold selectivity against SIRT2 and SIRT3.

Sirtinol is a specific SIRT1 and SIRT2 inhibitor with IC50 of 131 μM and 38 μM in cell-free assays, respectively.

Suramin sodium salt is a polysulfonated naphthylurea that inhibits the binding of calmodulin to recognition sites on the ryanodine receptor-1 (IC50 = 4.9 μM), blocks G protein coupling to GPCRs, and non-selectively antagonizes P2 purinergic receptors(10-100 μM).

OSS_128167 is a potent selective sirtuin 6 (SIRT6) inhibitor with IC50s of 89 μM, 1578 μM and 751 μM for SIRT6, SIRT1 and SIRT2, respectively. OSS_128167 has anti-HBV activity that inhibits HBV transcription and replication. OSS_128167 has anti-cancer, anti-inflammation and anti-viral effects.

3-TYP is a selective inhibitor of SIRT3.

Tenovin-6 is the water soluble analog of Tenovin-1 and acts as a potent SIRT1 (IC50=21 μM) and SIRT2 (IC50= 10 μM) inhibitor as well as p53 activator.

Resveratrol is one of the numerous polyphenolic compounds found in several vegetal sources, has a wide spectrum of targets with IC50 of 0.8, 1, 3.3 and 5 μM for Adenylyl cyclase, IKKβ, DNA polymerase α and δ, respectively.

Inauhzin is a small molecule that effectively reactivates p53 by inhibiting SIRT1 activity, and promotes p53-dependent apoptosis of human cancer cells without causing apparently genotoxic stress (IC50=3 μM, in A549 cell).

Salermide, a reverse amide, can act as an inhibitor of sirt, especially of sirt2, with the property of inducing apoptosis of tumor cells.

Quercetin Dihydrate inhibits various proteins including tyrosine protein kinase, mitochondrial phospholipase A2 and phosphodiesterases. It is a flavonoid with anticancer activity via suppressing type II estrogen receptors and blocking cell cycle progression. Quercetin could be found in a wide variety of plant-based foods, such as apples, onions, berries, and red wine etc..