Selisistat racemate is a racemic mixture of EX-527, an inhibitor of sirtuin 1 (SIRT1; IC50 = 0.098 µM). It is selective for SIRT1 over SIRT2, and SIRT3 (IC50s = 19.6 and 48.7 µM, respectively) and the cytochrome P450 (CYP) isoforms CYP3A4, CYP2D6, CYP2C9, CYP2C19, and CYP1A2 at 1 µM. EX-527 (50 µM) induces cell cycle arrest at the G1 phase in MCF-7 cells.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.