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

MedKoo CAT#: 406715

CAS#: 64232-83-3

Description: L189 is a DNA ligase I, III and IV inhibitor (IC50 values are 5, 9 and 5 μM respectively) that blocks DNA binding. L189 inhibits base excision repair (BER) and non-homologous end joining (NHEJ). L189 specifically sensitizes cancer cells to DNA damage and increases the cytotoxicity of DNA-damaging agents. L189 will not only provide insights into the cellular function of these enzymes but also serve as lead compounds for the development of anticancer agents.

Price and Availability

Size Price Shipping out time Quantity
10mg USD 90 Same day
50mg USD 150 Same day
100mg USD 250 Same day
200mg USD 450 Same day
500mg USD 750 Same day
1g USD 950 Same day
2g USD 1650 Same day
Inquire bulk and customized quantity

Pricing updated 2021-01-28. Prices are subject to change without notice.

L189, purity > 98%, is in stock. The same day shipping out after order is received.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 406715
Name: L189
CAS#: 64232-83-3
Chemical Formula: C11H10N4OS
Exact Mass: 246.05753
Molecular Weight: 246.29
Elemental Analysis: C, 53.64; H, 4.09; N, 22.75; O, 6.50; S, 13.02

Synonym: L189; L 189; L-189.

IUPAC/Chemical Name: (E)-6-amino-5-(benzylideneamino)-2-thioxo-2,3-dihydropyrimidin-4(1H)-one


InChi Code: InChI=1S/C11H10N4OS/c12-9-8(10(16)15-11(17)14-9)13-6-7-4-2-1-3-5-7/h1-6H,(H4,12,14,15,16,17)/b13-6+

SMILES Code: O=C(C(/N=C/C1=CC=CC=C1)=C(N)N2)NC2=S

Technical Data

Light yellow 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 X, Zhong S, Zhu X, Dziegielewska B, Ellenberger T, Wilson GM, MacKerell AD Jr, Tomkinson AE. Rational design of human DNA ligase inhibitors that target cellular DNA replication and repair. Cancer Res. 2008 May 1;68(9):3169-77. doi: 10.1158/0008-5472.CAN-07-6636. PubMed PMID: 18451142; PubMed Central PMCID: PMC2734474.