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

MedKoo CAT#: 201750

CAS#: 192441-08-0

Description: Lomeguatrib, also known as PaTrin-2, is a potent Inhibitor of O6-Alkylguanine-DNA-Alkyltransferase. Lomeguatrib is also a nontoxic low-molecular weight pseudosubstrate that has the ability to inactivate MGMT. Lomeguatrib can be used with temozolomide (TMZ) for GBM treatment.

Chemical Structure

CAS# 192441-08-0

Theoretical Analysis

MedKoo Cat#: 201750
Name: Lomeguatrib
CAS#: 192441-08-0
Chemical Formula: C10H8BrN5OS
Exact Mass: 324.96329
Molecular Weight: 326.17
Elemental Analysis: C, 36.82; H, 2.47; Br, 24.50; N, 21.47; O, 4.91; S, 9.83

Price and Availability

Size Price Availability Quantity
25.0mg USD 150.0 2 Weeks
50.0mg USD 250.0 2 Weeks
100.0mg USD 450.0 2 Weeks
200.0mg USD 750.0 2 Weeks
500.0mg USD 1250.0 2 Weeks
1.0g USD 2150.0 2 Weeks
2.0g USD 2950.0 2 Weeks
5.0g USD 4250.0 2 Weeks
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Synonym: PaTrin 2; PaTrin2; PaTrin-2; Lomeguatrib.

IUPAC/Chemical Name: 2-Amino-6-[(4-bromo-2-thienyl)methoxy]-9H-purine


InChi Code: InChI=1S/C10H8BrN5OS/c11-5-1-6(18-3-5)2-17-9-7-8(14-4-13-7)15-10(12)16-9/h1,3-4H,2H2,(H3,12,13,14,15,16)


Appearance: Off-white to grey solid powder

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

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).

Solubility: Soluble in DMSO, not in water

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).

HS Tariff Code: 2934.99.9001

Preparing Stock Solutions

The following data is based on the product molecular weight 326.17 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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1: Ugur HC, Taspinar M, Ilgaz S, Sert F, Canpinar H, Rey JA, Castresana JS, Sunguroglu A. Chemotherapeutic resistance in anaplastic astrocytoma cell lines treated with a temozolomide-lomeguatrib combination. Mol Biol Rep. 2014 Feb;41(2):697-703. doi: 10.1007/s11033-013-2908-5. Epub 2013 Dec 25. PubMed PMID: 24368590.

2: Taspinar M, Ilgaz S, Ozdemir M, Ozkan T, Oztuna D, Canpinar H, Rey JA, Sunguroğlu A, Castresana JS, Ugur HC. Effect of lomeguatrib-temozolomide combination on MGMT promoter methylation and expression in primary glioblastoma tumor cells. Tumour Biol. 2013 Jun;34(3):1935-47. doi: 10.1007/s13277-013-0738-7. Epub 2013 Mar 22. PubMed PMID: 23519841.

3: Tawbi HA, Villaruz L, Tarhini A, Moschos S, Sulecki M, Viverette F, Shipe-Spotloe J, Radkowski R, Kirkwood JM. Inhibition of DNA repair with MGMT pseudosubstrates: phase I study of lomeguatrib in combination with dacarbazine in patients with advanced melanoma and other solid tumours. Br J Cancer. 2011 Sep 6;105(6):773-7. doi: 10.1038/bjc.2011.285. Epub 2011 Aug 2. PubMed PMID: 21811257; PubMed Central PMCID: PMC3171007.

4: Watson AJ, Sabharwal A, Thorncroft M, McGown G, Kerr R, Bojanic S, Soonawalla Z, King A, Miller A, Waller S, Leung H, Margison GP, Middleton MR. Tumor O(6)-methylguanine-DNA methyltransferase inactivation by oral lomeguatrib. Clin Cancer Res. 2010 Jan 15;16(2):743-9. doi: 10.1158/1078-0432.CCR-09-1389. Epub 2010 Jan 12. PubMed PMID: 20068091; PubMed Central PMCID: PMC2807621.

5: Sabharwal A, Corrie PG, Midgley RS, Palmer C, Brady J, Mortimer P, Watson AJ, Margison GP, Middleton MR. A phase I trial of lomeguatrib and irinotecan in metastatic colorectal cancer. Cancer Chemother Pharmacol. 2010 Oct;66(5):829-35. doi: 10.1007/s00280-009-1225-0. Epub 2009 Dec 29. PubMed PMID: 20039040.

6: Watson AJ, Middleton MR, McGown G, Thorncroft M, Ranson M, Hersey P, McArthur G, Davis ID, Thomson D, Beith J, Haydon A, Kefford R, Lorigan P, Mortimer P, Sabharwal A, Hayward O, Margison GP. O(6)-methylguanine-DNA methyltransferase depletion and DNA damage in patients with melanoma treated with temozolomide alone or with lomeguatrib. Br J Cancer. 2009 Apr 21;100(8):1250-6. doi: 10.1038/sj.bjc.6605015. PubMed PMID: 19367283; PubMed Central PMCID: PMC2676560.

7: Kefford RF, Thomas NP, Corrie PG, Palmer C, Abdi E, Kotasek D, Beith J, Ranson M, Mortimer P, Watson AJ, Margison GP, Middleton MR. A phase I study of extended dosing with lomeguatrib with temozolomide in patients with advanced melanoma. Br J Cancer. 2009 Apr 21;100(8):1245-9. doi: 10.1038/sj.bjc.6605016. Epub 2009 Mar 31. PubMed PMID: 19367282; PubMed Central PMCID: PMC2676549.

8: Khan OA, Ranson M, Michael M, Olver I, Levitt NC, Mortimer P, Watson AJ, Margison GP, Midgley R, Middleton MR. A phase II trial of lomeguatrib and temozolomide in metastatic colorectal cancer. Br J Cancer. 2008 May 20;98(10):1614-8. doi: 10.1038/sj.bjc.6604366. Epub 2008 May 13. Erratum in: Br J Cancer. 2009 Aug 4;101(3):550. PubMed PMID: 18475294; PubMed Central PMCID: PMC2391129.

9: Ranson M, Hersey P, Thompson D, Beith J, McArthur GA, Haydon A, Davis ID, Kefford RF, Mortimer P, Harris PA, Baka S, Seebaran A, Sabharwal A, Watson AJ, Margison GP, Middleton MR. Randomized trial of the combination of lomeguatrib and temozolomide compared with temozolomide alone in chemotherapy naive patients with metastatic cutaneous melanoma. J Clin Oncol. 2007 Jun 20;25(18):2540-5. PubMed PMID: 17577032.

10: Caporaso P, Turriziani M, Venditti A, Marchesi F, Buccisano F, Tirindelli MC, Alvino E, Garbin A, Tortorelli G, Toppo L, Bonmassar E, D'Atri S, Amadori S. Novel role of triazenes in haematological malignancies: pilot study of Temozolomide, Lomeguatrib and IL-2 in the chemo-immunotherapy of acute leukaemia. DNA Repair (Amst). 2007 Aug 1;6(8):1179-86. Epub 2007 May 17. PubMed PMID: 17500047.

11: Ranson M, Middleton MR, Bridgewater J, Lee SM, Dawson M, Jowle D, Halbert G, Waller S, McGrath H, Gumbrell L, McElhinney RS, Donnelly D, McMurry TB, Margison GP. Lomeguatrib, a potent inhibitor of O6-alkylguanine-DNA-alkyltransferase: phase I safety, pharmacodynamic, and pharmacokinetic trial and evaluation in combination with temozolomide in patients with advanced solid tumors. Clin Cancer Res. 2006 Mar 1;12(5):1577-84. PubMed PMID: 16533784.

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