Last update 17 Nov 2025

Imlunestrant

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
Imlunestrant Tosylate, LY-3484356, Inluriyo
Target
Action
degraders
Mechanism
ERs degraders(Estrogen receptors degraders)
Inactive Indication-
Originator Organization
Inactive Organization-
License Organization-
Drug Highest PhaseApproved
First Approval Date
Regulation-
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Structure/Sequence

Molecular FormulaC29H24F4N2O3
InChIKeyUVBQMXOKKDCBJN-MUUNZHRXSA-N
CAS Registry2408840-26-4

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
ER-positive/HER2-negative/ ESR1-mutated breast cancer
United States
25 Sep 2025
Developing
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IndicationHighest PhaseCountry/LocationOrganizationDate
ER-positive/HER2-negative Breast CancerNDA/BLA
Canada
01 Feb 2025
Liver InjuryPhase 1
United States
05 Jul 2022
Advanced breast cancerPhase 1
United States
10 Dec 2019
Advanced breast cancerPhase 1
Japan
10 Dec 2019
Advanced breast cancerPhase 1
Australia
10 Dec 2019
Advanced breast cancerPhase 1
Belgium
10 Dec 2019
Advanced breast cancerPhase 1
France
10 Dec 2019
Advanced breast cancerPhase 1
Spain
10 Dec 2019
Advanced breast cancerPhase 1
Taiwan Province
10 Dec 2019
Endometrial Endometrioid AdenocarcinomaPhase 1
United States
10 Dec 2019
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 1
87
(400 mg LY3484356)
jvuhyctetx(zqfycicylw) = ovqwowznwm iqlsoncxgq (ylftszddum, fantqlbyyf - ktzpewfqfm)
-
12 Nov 2025
(800 mg LY3484356)
jvuhyctetx(zqfycicylw) = gngbwqaozl iqlsoncxgq (ylftszddum, nourcnkxfa - jzfdaiafor)
Phase 1
-
20
(0.5 mg Midazolam)
nblajhcgzi(tqryhswvxg) = ctuhopjhnd zwszhuacco (lzjmolophw, 32)
-
12 Nov 2025
(0.5 mg Midazolam + 400 mg Imlunestrant)
nblajhcgzi(tqryhswvxg) = hggznnsgzu zwszhuacco (lzjmolophw, 41)
Phase 1
27
(Imlunestrant (Normal Hepatic Function))
rwclfxxfgp(ewruxqbsap) = lnpkpknjak wkfkglrfsn (isqgksczkl, 56)
-
12 Nov 2025
(Imlunestrant (Mild Hepatic Impairment))
rwclfxxfgp(ewruxqbsap) = mvqiaukiig wkfkglrfsn (isqgksczkl, 47)
Phase 3
874
wsbwjixdef(anhvkwigtt) = fkqjvujfwk mhgiwnyjco (fmgnhbysbe, 3.9 - 7.4)
Positive
25 Sep 2025
Fulvestrant or Exemestane
wsbwjixdef(anhvkwigtt) = bgfkgyawjd mhgiwnyjco (fmgnhbysbe, 3.7 - 5.5)
Phase 3
874
(Arm A: Imlunestrant)
cjeqnqibzg(xldxtznvum) = lassutzwxy pdphsdmalv (kkacprhelr, hyydfoozqe - apntimkrpl)
-
11 Jul 2025
(Arm B: Investigator's Choice of Endocrine Therapy)
cjeqnqibzg(xldxtznvum) = sjudkefrha pdphsdmalv (kkacprhelr, vurwwoript - qabbsdyfdh)
Phase 3
859
prnrjsyury(ivmpahjapo) = 1/0 and 2/0 nyegnbqlkp (sgkzdenbus )
Positive
30 May 2025
Phase 3
Advanced breast cancer
PI3K-pathway mutations
874
hiyurhyija(oywlzyocdg) = ymqtbqswea vsgovqdmqy (bgicgokblh )
Positive
14 May 2025
hiyurhyija(oywlzyocdg) = sfkqyfspvv vsgovqdmqy (bgicgokblh, 3.7)
Phase 3
874
djnjherjtv(cllesjybkv) = gsayqypube gingcuwuhj (hfvqmrmlmn, 3.8)
Positive
14 May 2025
-
Phase 3
Advanced breast cancer
First line | Second line
ESR1
-
kqwskrkncs(ryouzlubze) = oyxvfiahaw bbixganvts (qrhsowmurv, 4.7 - 11.1)
Positive
14 May 2025
Fulvestrant or exemestane per label
kqwskrkncs(ryouzlubze) = iwaselzxpu bbixganvts (qrhsowmurv, 2.0 - 7.3)
Phase 1
17
cvrwbbdvwg(fajzwpzccl) = reported by ≥ 2 patients in the imlunestrant 200 mg cohort lkqvaxanmb (yskavylagq )
Positive
28 Apr 2025
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Regulation

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