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

MedKoo CAT#: 407273

CAS#: 1616391-87-7

Description: GSK591, also known as EPZ015866 and GSK3203591, is a chemical probe for PRMT5. In an in vitro biochemical assay, GSK591 potently inhibits the PRMT5/MEP50 complex from methylating (histone) H4 with IC50 = 11 nM. In Z-138 cells, GSK591 inhibits the symmetric arginine methylation of SmD3 with EC50 = 56 nM. Further, GSK591 is selective for PRMT5 (up to 50 micromolar) relative to a panel of methyltransferases. (

Price and Availability

Size Price Shipping out time Quantity
10mg USD 150 2 Weeks
25mg USD 250 2 Weeks
50mg USD 450 2 Weeks
100mg USD 750 2 Weeks
200mg USD 1250 2 Weeks
500mg USD 1950 2 Weeks
1g USD 3250 2 Weeks
2g USD 4350 2 Weeks
5g USD 7850 2 Weeks
Inquire bulk and customized quantity

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

GSK591, purity > 98%, is in stock. Current shipping out time is about 2 weeks after order is received. CoA, QC data and MSDS documents are available in one week after order is received.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 407273
Name: GSK591
CAS#: 1616391-87-7
Chemical Formula: C22H28N4O2
Exact Mass: 380.2212
Molecular Weight: 380.492
Elemental Analysis: C, 69.45; H, 7.42; N, 14.73; O, 8.41

Synonym: GSK591; GSK-591; GSK 591; EPZ015866; EPZ-015866; EPZ 015866; GSK 3203591; GSK-3203591; GSK3203591.

IUPAC/Chemical Name: (S)-2-(cyclobutylamino)-N-(3-(3,4-dihydroisoquinolin-2(1H)-yl)-2-hydroxypropyl)isonicotinamide


InChi Code: InChI=1S/C22H28N4O2/c27-20(15-26-11-9-16-4-1-2-5-18(16)14-26)13-24-22(28)17-8-10-23-21(12-17)25-19-6-3-7-19/h1-2,4-5,8,10,12,19-20,27H,3,6-7,9,11,13-15H2,(H,23,25)(H,24,28)/t20-/m0/s1


Technical Data

Solid powder

>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).

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:

Additional Information

Protein arginine methyltransferases (PRMTs) play a crucial role in a variety of biological processes . Overexpression of PRMTs has been implicated in various human diseases including cancer. To date, nine PRMTs have been identified and they are grouped into three categories: types I, II and III. Type II PRMTs, 5 and 9, catalyze symmetric dimethylation of arginine residues, however, PRMT5 is the predominant enzyme for this process. PRMT5 interacts with a number of binding partners that influence its substrate specificity. In particular, MEP50, a member of the WD40 family of proteins, is required for PRMT5 methyltransferase activity. (