Catalog No. size PriceQuantity
M7117-2 2mg solid $96
M7117-10 10mg solid $396


RAMB4, also known as PTP1B-IN-9, is a ubiquitin-proteasome system (UPS)-stressor. RAMB4 selectively reduces the viability of cervical cancer cells independently of HPV genotype via blockade of proteasomal degradation. RAMB4 treatment triggers a Ubiquitin-Proteasome-System (UPS)-stress response without affecting 20S proteasome catalytic activities.

Product information

CAS Number: 145888-79-5

Molecular Weight: 413.12

Formula: C19H13Cl4NO








Chemical Name: (3E,5E)-3,5-Bis(3,4-dichlorobenzylidene)piperidin-4-one

Smiles: O=C1/C(/CNC/C/1=C\C1=CC(Cl)=C(Cl)C=C1)=C/C1=CC(Cl)=C(Cl)C=C1


InChi: InChI=1S/C19H13Cl4NO/c20-15-3-1-11(7-17(15)22)5-13-9-24-10-14(19(13)25)6-12-2-4-16(21)18(23)8-12/h1-8,24H,9-10H2/b13-5+,14-6+

Technical Data

Appearance: Solid Power.

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: Soluble in DMSO

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined.

HS Tariff Code: 382200

How to use

In Vitro:

PTP1B-IN-9 (0-30 µM; 48 hours) treatment produces a dose dependent reduction in the viability of HPV16-positive SiHa and Caski cells and HPV-39-positive ME180 cervical cancer cell lines respectively. PTP1B-IN-9 reduces the cell viability of exponentially growing HeLa cervical cancer cells in a dose-dependent fashion with an IC50 value of 2 µM.


  1. Anchoori RK, et al. Stressing the ubiquitin-proteasome system without 20S proteolytic inhibition selectively kills cervical cancer cells.PLoS One. 2011;6(8):e23888.

Products are for research use only. Not for human use.

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