Belzutifan (PT2977, MK-6482) is a potent and selective small-molecule inhibitor of HIF2α with SPA IC50 of 9 nM, EC50 of 11 nM (HIF-2α luciferase assay). PT2977 demonstrated high potency with EC50 of 17 nM in the VEGFA secretion assay in 786-O cells. PT2977 (0.3, 1, and 3 mg/kg, oral) potently and dose-dependently reduced mRNA levels of human cyclin D1, a target gene regulated by HIF-2α, exhibited excellent antitumor activity in the 786-O mouse xenograft model In phase 1 clinical, PT2977 decreased in the HIF-2α target erythropoietin (EPO) following once daily oral administration of PT2977 at the dose levels of 20, 40, 80, 120, 160, and 240 mg in patients with solid tumors, also showed encouraging outcomes in patients with advanced renal cell carcinoma in an expansion cohort of 55 patients with ccRCC treated at 120 mg q.d.

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.