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estrogen receptor inhibitor, orally active
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Tel: +1-832-696-8203

Email: [email protected]

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IC50: 0.82, 0.14 and 0.28 nM for ERα binding, ERα downregulation, ERα antagonism, respectively

AZD9496 is an orally active estrogen receptor inhibitor.

Estrogen receptors (ERs) are a group of proteins presented inside and on cells, and they are receptors that are activated by the hormoneestrogen. ERs are found to be over-expressed in about 70% of breast cancer cases, referred to as "ER-positive".

In vitro: AZD9496 was identified as a nonsteroidal small-molecule inhibitor of ERα, which was a potent and selective antagonist and downregulator of ERα. In addition, AZD9496 could bind and downregulate clinically relevant ESR1 mutants [1].

In vivo: Animal study reported that significant tumor growth inhibition was observed as low as 0.5 mg/kg dose of AZD9496 in the estrogen-dependent MCF-7 xenograft model, and such effect was accompanied by a dose-dependent decrease in PR protein levels, providing potent antagonist activity. In addition, the combination of AZD9496 with PI3K pathway and CDK4/6 inhibitors resulted in further growth-inhibitory effects when compared with monotherapy alone. Furthermore, the tumor regression was also observed in a long-term estrogen-deprived breast model, in which significant ERα protein downregulation was found [1].

Clinical trial: AZD9496 is currently being evaluated in a phase I clinical trial to assess the PK and safety of different forms and formulations [2].

[1] Weir HM et al.  AZD9496: An Oral Estrogen Receptor Inhibitor That Blocks the Growth of ER-Positive and ESR1-Mutant Breast Tumors in Preclinical Models. Cancer Res. 2016 Jun 1;76(11):3307-18.
[2] https://clinicaltrials. gov/ct2/show/NCT02780713 term=AZD9496&rank=2

Chemical Properties

StorageStore at -20°C
Cas No.1639042-08-2
SolubilitySoluble in DMSO
Chemical Name(E)-3-(3,5-difluoro-4-((1R,3R)-2-(2-fluoro-2-methylpropyl)-3-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indol-1-yl)phenyl)acrylic acid
SDFDownload SDF
Canonical SMILESO=C(O)/C=C/C1=CC(F)=C([[email protected]]2N(CC(C)(F)C)[[email protected]](C)CC3=C2NC4=CC=CC=C34)C(F)=C1
Shipping ConditionEvaluation sample solution : ship with blue ice.All other available size: ship with RT , or blue ice upon request
General tipsFor obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.

Quality Control

Quality Control & MSDS

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Chemical structure