H203 is a potent dual Mdm2/MdmX inhibitor with Ki of 2/11 nM, respectively; H203 significantly reduced cell viability in the cells overexpressing both Mdm2 and MdmX, and a significant and dose-dependent decrease in cell number in H203-treated cells lacking Mdm2 or MdmX. H203-mediated decrease in cell viability is strictly p53-dependent and H203 affects MdmX more specifically than nutlin-3a. H203 induced the expression of the p21 gene but not the p53 gene in treated cancer 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.