H3B-5942

H3B-5942 is a selective, irreversible and orally active estrogen receptor covalent antagonist, inactivates both wild-type and mutant ERα by targeting Cys530, with Kis of 1 nM and 0.41 nM, respectively. H3B-5942 reduces ERα target gene GREB1, shows potent antitumor activity both in multiple cell lines or animals bearing ERαWT or ERα mutations.

Product information

CAS Number: 2052128-15-9

Molecular Weight: 494.63

Formula: C31H34N4O2

Chemical Name: (2E)-4-[(2-{4-[(1E)-1-(1H-indazol-5-yl)-2-phenylbut-1-en-1-yl]phenoxy}ethyl)amino]-N,N-dimethylbut-2-enamide

Smiles: CC/C(=C(\C1C=C2C=NNC2=CC=1)/C1C=CC(=CC=1)OCCNC/C=C/C(=O)N(C)C)/C1C=CC=CC=1

InChiKey: BYAUIDXIQATDBT-GIHLFXONSA-N

InChi: InChI=1S/C31H34N4O2/c1-4-28(23-9-6-5-7-10-23)31(25-14-17-29-26(21-25)22-33-34-29)24-12-15-27(16-13-24)37-20-19-32-18-8-11-30(36)35(2)3/h5-17,21-22,32H,4,18-20H2,1-3H3,(H,33,34)/b11-8+,31-28+

Technical Data

Appearance: Solid Power

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

Solubility: DMSO : 83.33 mg/mL (168.47 mM; Need ultrasonic).

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:

H3B-5942 is a selective and irreversible estrogen receptor covalent antagonist, inactivates both wild-type and mutant ERα by targeting Cys530, with Kis of 1 nM and 0.41 nM, respectively. H3B-5942 elevates ERα protein level distinct from SERMs/SERD, blocks ERα-dependent transcription in breast cancer cells. H3B-5942 (0.01-10 μM) reduces ERα target gene GREB1 in MCF7-ERαWT, various MCF7-ERαMUT lines, and the PDX-ERαY537S/WT line. H3B-5942 also decreases proliferation of MCF7-Parental, MCF7-LTED-ERαWT, and MCF7-LTED-ERαY537C lines with GI50s of 0.5, 2, and 30 nM, respectively. H3B-5942 (10-25 nM) in combination with CDK4/6 inhibitors (≥25 pM) has synergic inhibitory effect on multiple cell lines bearing ERαWT or clinically frequent ERα mutations.

In Vivo:

H3B-5942 (1, 3, 10, or 30 mg/kg, p.o, q.d. for 17 days) dose-dependently inhibits tumor growth in MCF7 xenograft model in athymic female nude mice. H3B-5942 (3, 10, 30, 100, and 200 mg/kg, p.o, q.d.) exhibits similar anti-tumor activity in the ERαY537S/WT ST941 model in athymic female nude mice.

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