GS-443902 trisodium (GS-441524 triphosphate trisodium) is a potent viral RNA-dependent RNA-polymerases (RdRp) inhibitor with IC₅₀s of 1.1 µM, 5 µM for RSV RdRp and HCV RdRp, respectively. GS-443902 trisodium is the active triphosphate metabolite of Remdesivir (GS-5734)^[1][2].

IC50: 1.1 µM (RSV RdRp) and 5 µM (HCV RdRp)^[1][2]

In a continuous 72 h incubation of 1 µM Remdesivir (GS-5734), the GS-443902 trisodium (GS-441524 triphosphate trisodium; Remdesivir metabolite trisodium) level is measured at 2, 24, 48 and 72 h, and reaches a C_max of 300, 110, and 90 pmol/million cells in macrophages, HMVEC, and HeLa cells lines respectively^[1].
GS-443902 trisodium (compound 8a) is a triphosphates (TP) derivative^[2].
GS-443902 trisodium (NTP; 0.01, 0.1, 1, 10, 100 μM) inhibits RSV RdRp-catalysed RNA synthesis by incorporating into the nascent viral RNA transcript and causing its premature termination. GS-5734 selectively inhibits EBOV replication by targeting its RdRp and inhibiting viral RNA synthesis following efficient intracellular conversion to GS-443902 sodium^[3].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Remdesivir (GS-5734; 10 mg kg; i.v.) rapidly distributes into peripheral blood mononuclear cells (PBMCs), and efficient conversion to GS-443902 trisodium (Remdesivir metabolite trisodium; NTP) is apparent within 2 h of dose administration in rhesus monkeys. In PBMCs, GS-443902 trisodium represents the predominant metabolite and is persistent with a t_1/2 of 14 h and levels required for >50% virus inhibition for 24 hours^[3].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

597.15

C₁₂H₁₃N₅Na₃O₁₃P₃

1355050-21-3

Solid

White to light yellow

O=P(OP(O)(O[Na])=O)(O[Na])OP(OC[C@@H](O1)[C@@H](O)[C@@H](O)[C@]1(C#N)C2=CC=C3N2N=CN=C3N)(O[Na])=O

Shipping with dry ice.

-80°C, protect from light, stored under nitrogen

*The compound is unstable in solutions, freshly prepared is recommended.

* Please refer to the solubility information to select the appropriate solvent. The compound is unstable in solutions, freshly prepared is recommended.

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

• [1]. Siegel D, et al. Discovery and Synthesis of a Phosphoramidate Prodrug of a Pyrrolo[2,1-f][triazin-4-amino] Adenine C-Nucleoside (GS-5734) for the Treatment of Ebola and Emerging Viruses. Med Chem. 2017 Mar 9;60(5):1648-1661.  [Content Brief]

  [2]. Warren TK, et al. Therapeutic efficacy of the small molecule GS-5734 against Ebola virus in rhesus monkeys. Nature. 2016 Mar 17;531(7594):381-5.  [Content Brief]

  [3]. Cho A, et al. Synthesis and antiviral activity of a series of 1'-substituted 4-aza-7,9-dideazaadenosine C-nucleosides. Bioorg Med Chem Lett. 2012 Apr 15;22(8):2705-7.  [Content Brief]