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

MedKoo CAT#: 407205

CAS#: 1624602-30-7

Description: VR23 is a potent and selective inhibitor of trypsin-like proteasomes (IC50 = 1 nmol/L), chymotrypsin-like proteasomes (IC50 = 50-100 nmol/L), and caspase-like proteasomes (IC50 = 3 μmol/L). The primary molecular target of VR23 was β2 of the 20S proteasome catalytic subunit. Notably, VR23 was structurally distinct from other known proteasome inhibitors and selectively killed cancer cells by apoptosis, with little effect on noncancerous cells. VR23 was effective in vivo in controlling multiple myelomas and metastatic breast cancer cells, in the latter case also enhancing the antitumor activity of paclitaxel while reducing its side effects.

Price and Availability

Size Price Shipping out time Quantity
10mg USD 150 Same day
25mg USD 250 Same day
50mg USD 450 Same day
100mg USD 650 Same day
200mg USD 850 Same day
500mg USD 1450 Same day
1g USD 2450 2 weeks
2g USD 4250 2 weeks
5g USD 7950 2 weeks
Inquire bulk and customized quantity

Pricing updated 2021-01-18. Prices are subject to change without notice.

VR23, purity > 98%, is in stock.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 407205
Name: VR23
CAS#: 1624602-30-7
Chemical Formula: C19H16ClN5O6S
Exact Mass: 477.05098
Molecular Weight: 477.876
Elemental Analysis: C, 47.75; H, 3.37; Cl, 7.42; N, 14.66; O, 20.09; S, 6.71

Synonym: VR23, VR-23, VR 23

IUPAC/Chemical Name: 7-chloro-4-(4-((2,4-dinitrophenyl)sulfonyl)piperazin-1-yl)quinoline


InChi Code: InChI=1S/C19H16ClN5O6S/c20-13-1-3-15-16(11-13)21-6-5-17(15)22-7-9-23(10-8-22)32(30,31)19-4-2-14(24(26)27)12-18(19)25(28)29/h1-6,11-12H,7-10H2

SMILES Code: O=S(N1CCN(C2=CC=NC3=CC(Cl)=CC=C32)CC1)(C4=C(C=C(C=C4)[N+]([O-])=O)[N+]([O-])=O)=O

Technical Data

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: Pundir S, Vu HY, Solomon VR, McClure R, Lee H. VR23: A Quinoline-Sulfonyl Hybrid Proteasome Inhibitor That Selectively Kills Cancer via Cyclin E-Mediated Centrosome Amplification. Cancer Res. 2015 Oct 1;75(19):4164-75. doi:10.1158/0008-5472.CAN-14-3370. Epub 2015 Aug 3. PubMed PMID: 26238784.