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

MedKoo CAT#: 556100

CAS#: 2713577-16-1

Description: SKLB-197 is a potent and highly selective ATR inhibitor. SKLB-197 showed an IC50 value of 0.013 μM against ATR but very weak or no activity against other 402 protein kinases. It displayed potent antitumor activity against ATM-deficent tumors both in vitro and in vivo. In addition, this compound exhibited good pharmacokinetic properties.

Chemical Structure

CAS# 2713577-16-1

Theoretical Analysis

MedKoo Cat#: 556100
Name: SKLB-197
CAS#: 2713577-16-1
Chemical Formula: C25H24N6O
Exact Mass: 424.2012
Molecular Weight: 424.508
Elemental Analysis: C, 70.73; H, 5.70; N, 19.80; O, 3.77

Price and Availability

Size Price Availability Quantity
50.0mg USD 450.0 2 Weeks
100.0mg USD 750.0 2 Weeks
200.0mg USD 1250.0 2 Weeks
500.0mg USD 2650.0 2 Weeks
1.0g USD 3650.0 2 Weeks
2.0g USD 6250.0 2 Weeks
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Synonym: SKLB-197; SKLB 197; SKLB197;

IUPAC/Chemical Name: Quinazoline, 2-(1H-indol-4-yl)-4-[(3R)-3-methyl-4-morpholinyl]-6-(1-methyl-1H-pyrazol-5-yl)-


InChi Code: InChI=1S/C25H24N6O/c1-16-15-32-13-12-31(16)25-20-14-17(23-9-11-27-30(23)2)6-7-22(20)28-24(29-25)19-4-3-5-21-18(19)8-10-26-21/h3-11,14,16,26H,12-13,15H2,1-2H3/t16-/m1/s1


Appearance: 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: To be determined

Shelf Life: >2 years if stored properly

Drug Formulation: To be determined

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 424.508 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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Bin H, Chen P, Wu M, Wang F, Lin G, Pan S, Liu J, Mu B, Nan J, Huang Q, Li L, Yang S. Discovery of a potent and highly selective inhibitor of ataxia telangiectasia mutated and Rad3-Related (ATR) kinase: Structural activity relationship and antitumor activity both in vitro and in vivo. Eur J Med Chem. 2022 Mar 15;232:114187. doi: 10.1016/j.ejmech.2022.114187. Epub 2022 Feb 12. PMID: 35183872.


50.0mg / USD 450.0