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

MedKoo CAT#: 206562

CAS#: 1190932-38-7

Description: COH29 is an orally available, aromatically substituted thiazole and inhibitor of the human ribonucleotide reductase (RNR), with potential antineoplastic activity. Upon oral administration, the RNR inhibitor COH29 binds to the ligand-binding pocket of the RNR M2 subunit (hRRM2) near the C-terminal tail. This blocks the interaction between the hRRM1 and hRRM2 subunits and interferes with the assembly of the active hRRM1/hRRM2 complex of RNR. Inhibition of RNR activity decreases the pool of deoxyribonucleotide triphosphates available for DNA synthesis. The resulting decrease in DNA synthesis causes cell cycle arrest and growth inhibition. In addition, this agent may inhibit the nuclear enzyme poly (ADP-ribose) polymerase (PARP) 1, which prevents the repair of damaged DNA, and causes both the accumulation of single and double strand DNA breaks and the induction of apoptosis.

Price and Availability

Size Price Shipping out time Quantity
50mg USD 450 Same day
100mg USD 850 Same day
200mg USD 1550 Same day
500mg USD 2650 Same day
1g USD 3650 Same day
2g USD 5450 2 Weeks
5g USD 8950 2 Weeks
Inquire bulk and customized quantity

Pricing updated 2021-01-20. Prices are subject to change without notice.

COH29, purity > 98%, is in stock. The same day shipping out after order is received.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 206562
Name: COH29
CAS#: 1190932-38-7
Chemical Formula: C22H16N2O5S
Exact Mass: 420.078
Molecular Weight: 420.439
Elemental Analysis: C, 62.85; H, 3.84; N, 6.66; O, 19.03; S, 7.63

Synonym: COH29; COH-29; COH 29.

IUPAC/Chemical Name: N-(4-(3,4-dihydroxyphenyl)-5-phenylthiazol-2-yl)-3,4-dihydroxybenzamide


InChi Code: InChI=1S/C22H16N2O5S/c25-15-8-6-13(10-17(15)27)19-20(12-4-2-1-3-5-12)30-22(23-19)24-21(29)14-7-9-16(26)18(28)11-14/h1-11,25-28H,(H,23,24,29)

SMILES Code: OC1=C(O)C=C(C(NC2=NC(C3=CC(O)=C(O)C=C3)=C(C4=CC=CC=C4)S2)=O)C=C1

Technical Data

Solid powder

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

Certificate of Analysis:

Safety Data Sheet (SDS):

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, 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:


1: Chen YR, Tsou B, Hu S, Ma H, Liu X, Yen Y, Ann DK. Autophagy induction causes a synthetic lethal sensitization to ribonucleotide reductase inhibition in breast cancer cells. Oncotarget. 2016 Jan 12;7(2):1984-99. doi: 10.18632/oncotarget.6539. PubMed PMID: 26675256; PubMed Central PMCID: PMC4811511.

2: Chen MC, Zhou B, Zhang K, Yuan YC, Un F, Hu S, Chou CM, Chen CH, Wu J, Wang Y, Liu X, Smith DL, Li H, Liu Z, Warden CD, Su L, Malkas LH, Chung YM, Hu MC, Yen Y. The Novel Ribonucleotide Reductase Inhibitor COH29 Inhibits DNA Repair In Vitro. Mol Pharmacol. 2015 Jun;87(6):996-1005. doi: 10.1124/mol.114.094987. Epub 2015 Mar 26. PubMed PMID: 25814515; PubMed Central PMCID: PMC4429719.

3: Zhang H, Liu X, Warden CD, Huang Y, Loera S, Xue L, Zhang S, Chu P, Zheng S, Yen Y. Prognostic and therapeutic significance of ribonucleotide reductase small subunit M2 in estrogen-negative breast cancers. BMC Cancer. 2014 Sep 11;14:664. doi: 10.1186/1471-2407-14-664. PubMed PMID: 25213022; PubMed Central PMCID: PMC4171582.

4: Zhou B, Su L, Hu S, Hu W, Yip ML, Wu J, Gaur S, Smith DL, Yuan YC, Synold TW, Horne D, Yen Y. A small-molecule blocking ribonucleotide reductase holoenzyme formation inhibits cancer cell growth and overcomes drug resistance. Cancer Res. 2013 Nov 1;73(21):6484-93. doi: 10.1158/0008-5472.CAN-13-1094. Epub 2013 Sep 26. PubMed PMID: 24072748; PubMed Central PMCID: PMC3823501.