WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 329516

CAS#: 1446321-46-5

Description: Voxelotor, also known as GBT-440, is a hemoglobin S allosteric modulator. GBT440 Inhibits Sickling of Sickle Cell Trait Blood Under In Vitro Conditions Mimicking Strenuous Exercise. GBT440 increases haemoglobin oxygen affinity, reduces sickling and prolongs RBC half-life in a murine model of sickle cell disease. GBT440 increases haemoglobin oxygen affinity, reduces sickling and prolongs RBC half-life in a murine model of sickle cell disease.

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Voxelotor, purity > 98%, is in stock.The same day shipping out after order is received.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 329516
Name: Voxelotor
CAS#: 1446321-46-5
Chemical Formula: C19H19N3O3
Exact Mass: 337.1426
Molecular Weight: 337.379
Elemental Analysis: C, 67.64; H, 5.68; N, 12.46; O, 14.23

Synonym: Voxelotor, GBT-440, GBT 440, GBT440, GTx-011, GTx011, GTx 011; Oxbryta.

IUPAC/Chemical Name: 2-hydroxy-6-({2-[1-(propan-2-yl)-1H-pyrazol-5-yl]pyridin-3-yl}methoxy)benzaldehyde


InChi Code: InChI=1S/C19H19N3O3/c1-13(2)22-16(8-10-21-22)19-14(5-4-9-20-19)12-25-18-7-3-6-17(24)15(18)11-23/h3-11,13,24H,12H2,1-2H3


Technical Data

Solid powder

>98% (or refer to the Certificate of Analysis)

Certificate of Analysis:

Safety Data Sheet (MSDS):

Shipping Condition:
Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition:
Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Soluble in DMSO

Shelf Life:
>2 years if stored properly

Drug Formulation:
This drug may be formulated in DMSO

Stock Solution Storage:
0 - 4 C for short term (days to weeks), or -20 C for long term (months).

Harmonized System Code:


1: Vichinsky E, Hoppe CC, Ataga KI, Ware RE, Nduba V, El-Beshlawy A, Hassab H, Achebe MM, Alkindi S, Brown RC, Diuguid DL, Telfer P, Tsitsikas DA, Elghandour A, Gordeuk VR, Kanter J, Abboud MR, Lehrer-Graiwer J, Tonda M, Intondi A, Tong B, Howard J; HOPE Trial Investigators. A Phase 3 Randomized Trial of Voxelotor in Sickle Cell Disease. N Engl J Med. 2019 Aug 8;381(6):509-519. doi: 10.1056/NEJMoa1903212. Epub 2019 Jun 14. PubMed PMID: 31199090.

2: Hutchaleelaha A, Patel M, Washington C, Siu V, Allen E, Oksenberg D, Gretler DD, Mant T, Lehrer-Graiwer J. Pharmacokinetics and pharmacodynamics of voxelotor (GBT440) in healthy adults and patients with sickle cell disease. Br J Clin Pharmacol. 2019 Jun;85(6):1290-1302. doi: 10.1111/bcp.13896. Epub 2019 Mar 31. PubMed PMID: 30743314; PubMed Central PMCID: PMC6533444.

3: Howard J, Hemmaway CJ, Telfer P, Layton DM, Porter J, Awogbade M, Mant T, Gretler DD, Dufu K, Hutchaleelaha A, Patel M, Siu V, Dixon S, Landsman N, Tonda M, Lehrer-Graiwer J. A phase 1/2 ascending dose study and open-label extension study of voxelotor in patients with sickle cell disease. Blood. 2019 Apr 25;133(17):1865-1875. doi: 10.1182/blood-2018-08-868893. Epub 2019 Jan 17. PubMed PMID: 30655275; PubMed Central PMCID: PMC6484388.

4: Shet AS, Mendelsohn L, Harper J, Ostrowski D, Henry ER, Gwaabe E, Nichols J, Alayash AI, Eaton WA, Thein SL. Voxelotor treatment of a patient with sickle cell disease and very severe anemia. Am J Hematol. 2019 Apr;94(4):E88-E90. doi: 10.1002/ajh.25389. Epub 2019 Jan 8. PubMed PMID: 30592074; PubMed Central PMCID: PMC6408257.

5: Telfer P, Agodoa I, Fox KM, Burke L, Mant T, Jurek M, Tonda M, Lehrer-Graiwer J. Impact of voxelotor (GBT440) on unconjugated bilirubin and jaundice in sickle cell disease. Hematol Rep. 2018 May 22;10(2):7643. doi: 10.4081/hr.2018.7643. eCollection 2018 May 14. PubMed PMID: 30046415; PubMed Central PMCID: PMC6036983.

6: Blyden G, Bridges KR, Bronte L. Case series of patients with severe sickle cell disease treated with voxelotor (GBT440) by compassionate access. Am J Hematol. 2018 May 12. doi: 10.1002/ajh.25139. [Epub ahead of print] PubMed PMID: 29752824.

7: Rutherford NJ, Thoren KL, Shajani-Yi Z, Colby JM. Voxelotor (GBT440) produces interference in measurements of hemoglobin S. Clin Chim Acta. 2018 Jul;482:57-59. doi: 10.1016/j.cca.2018.03.032. Epub 2018 Mar 27. PubMed PMID: 29601794.

8: Estepp JH. Voxelotor (GBT440), a first-in-class hemoglobin oxygen-affinity modulator, has promising and reassuring preclinical and clinical data. Am J Hematol. 2018 Mar;93(3):326-329. doi: 10.1002/ajh.25042. PubMed PMID: 29352729.