U.S. Department of Health & Human Services Divider Arrow National Institutes of Health Divider Arrow NCATS

Details

Stereochemistry ABSOLUTE
Molecular Formula C17H19N3.C4H4O4
Molecular Weight 381.425
Optical Activity UNSPECIFIED
Defined Stereocenters 1 / 1
E/Z Centers 1
Charge 0

SHOW SMILES / InChI
Structure of ESMIRTAZAPINE MALEATE

SMILES

OC(=O)\C=C/C(O)=O.CN1CCN2[C@H](C1)C3=CC=CC=C3CC4=CC=CN=C24

InChI

InChIKey=RPUBHMMISKEXSR-MLCLTIQSSA-N
InChI=1S/C17H19N3.C4H4O4/c1-19-9-10-20-16(12-19)15-7-3-2-5-13(15)11-14-6-4-8-18-17(14)20;5-3(6)1-2-4(7)8/h2-8,16H,9-12H2,1H3;1-2H,(H,5,6)(H,7,8)/b;2-1-/t16-;/m1./s1

HIDE SMILES / InChI

Molecular Formula C17H19N3
Molecular Weight 265.3529
Charge 0
Count
Stereochemistry ABSOLUTE
Additional Stereochemistry No
Defined Stereocenters 1 / 1
E/Z Centers 0
Optical Activity UNSPECIFIED

Molecular Formula C4H4O4
Molecular Weight 116.0722
Charge 0
Count
Stereochemistry ACHIRAL
Additional Stereochemistry No
Defined Stereocenters 0 / 0
E/Z Centers 1
Optical Activity NONE

Esmirtazapine (S-(+)mirtazapine or ORG-50081) is an enantiomer of mirtazapine (REMERON®), a high-affinity antagonist at 5-HT2/5-HT3 and H1 receptors, used in the treatment of depression. Esmirtazapine has a shorter plasma half-life than the R(−) enantiomer. Esmirtazapine is preferentially metabolized into an 8-hydroxy glucuronide. Organon was developing esmirtazapine for the treatment of hot flushes (vasomotor symptoms) associated with the menopause and insomnia.

Approval Year

PubMed

PubMed

TitleDatePubMed
Gene expression profiling in whole blood identifies distinct biological pathways associated with obesity.
2010-12-01
Cancer cachexia: traditional therapies and novel molecular mechanism-based approaches to treatment.
2010-12
QEEG Measures in Huntington's Disease: A Pilot Study.
2010-10-25
Behavioral and developmental changes in rats with prenatal exposure of mirtazapine.
2010-04-04
Local smoke-free policy development in Santa Fe, Argentina.
2010-04
Mania associated with mirtazepine treatment and mixed depression.
2010-01
Extreme thermal sensitivity and pain-induced sensitization in a fibromyalgia patient.
2010
Comorbidities of migraine.
2010
3D-QSAR design of new escitalopram derivatives for the treatment of major depressive disorders.
2009-12-21
Algorithms for the assessment and management of insomnia in primary care.
2009-11-03
Undertreatment of menopausal symptoms and novel options for comprehensive management.
2009-11
Fibromyalgia and myofascial pain syndrome-a dilemma.
2009-10
Sexual side-effects of contemporary antidepressants: review.
2009-09
Brain potentials of conflict and error-likelihood following errorful and errorless learning in obsessive-compulsive disorder.
2009-08-12
Early presentation following overdose of modified-release paracetamol (Panadol Osteo) with biphasic and prolonged paracetamol absorption.
2009-08-07
Management of difficult urticaria.
2009-07
Treatment with selective serotonin reuptake inhibitors and mirtapazine results in differential brain activation by visual erotic stimuli in patients with major depressive disorder.
2009-06
Incidence of major malformations in infants following antidepressant exposure in pregnancy: results of a large prospective cohort study.
2009-04
Ethyl carbamate in alcoholic beverages from Mexico (tequila, mezcal, bacanora, sotol) and Guatemala (cuxa): market survey and risk assessment.
2009-01
Routing protocols in wireless sensor networks.
2009
A new paradigm for the prediction of antidepressant treatment response.
2009
Brain-derived neurotrophic factor: role in depression and suicide.
2009
Psychopharmacology of ADHD in pediatrics: current advances and issues.
2009
Mirtazapine: a review of its use in major depression and other psychiatric disorders.
2009
Triple reuptake inhibitors: the next generation of antidepressants.
2008-12
Neuropharmacology.
2008-10
Triple reuptake inhibitors: a premise and promise.
2008-09
A postmenopausal woman presenting with Ekbom syndrome associated with recurrent depressive disorder: a case report.
2008-07-22
Pharmacological management of panic disorder.
2008-02
Outcomes after isolated mirtazapine (Remeron) supratherapeutic ingestions.
2008-01
Treatment of depression as part of end-of-life care.
2008
Toward achieving optimal response: understanding and managing antidepressant side effects.
2008
5-HT(2A) inverse-agonists for the treatment of insomnia.
2008
Post-traumatic stress disorder.
2007-08-01
"Add-On"-therapy with an individualized preparation consisting of free amino acids for patients with a major depression.
2007-06
Essential tremor.
2007-05-01
A survey of combination antidepressant use in Australia.
2007-02
In silico prediction of pregnane X receptor activators by machine learning approaches.
2007-01
Family history, early adversity and the hypothalamic-pituitary-adrenal (HPA) axis: Mediation of the vulnerability to mood disorders.
2007
[Differentiated approach to the therapy of endogenous anxious depression].
2007
[Depressive disturbances during antiviral therapy in patients with type C hepatitis].
2007
Improvement in cognitive and psychosocial functioning and self image among adolescent inpatient suicide attempters.
2006-12-29
Pharmacological treatment of primary negative symptoms in schizophrenia: a systematic review.
2006-12
Prophylaxis of migraine.
2006-09
[Compliance in psychiatry: results of a survey of depressed patients using orally disintegrating tablet].
2006
Repeated treatment with mirtazepine induces brain-derived neurotrophic factor gene expression in rats.
2005-12
Onset of improvement and response to mirtazapine in depression: a multicenter naturalistic study of 4771 patients.
2005-03
Behavioral disturbances in dementia.
2003-03
Pathophysiology of depression and mechanisms of treatment.
2002-03
Treating age-related changes in somatotrophic hormones, sleep, and cognition.
2001-09
Patents

Sample Use Guides

Phase III trials: 0.5-18 mg once daily for 1-52 weeks
Route of Administration: Oral
Substance Class Chemical
Created
by admin
on Mon Mar 31 18:07:48 GMT 2025
Edited
by admin
on Mon Mar 31 18:07:48 GMT 2025
Record UNII
I2U18E6JKA
Record Status Validated (UNII)
Record Version
  • Download
Name Type Language
ORG 50081
Preferred Name English
ESMIRTAZAPINE MALEATE
USAN   WHO-DD  
USAN  
Official Name English
Esmirtazapine maleate [WHO-DD]
Common Name English
(+)-(14BS)-2-METHYL-1,2,3,4,10,14B-HEXAHYDROPYRAZINO(2,1-A)PYRIDO(2,3-C)(2)BENZAZEPINE (2Z)-BUTENEDIOATE
Common Name English
ORG-50081
Code English
PYRAZINO(2,1-A)PYRIDO(2,3-C)(2)BENZAZEPINE, 1,2,3,4,10,14B-HEXAHYDRO-2-METHYL-, (14BS)-, (2Z)-2-BUTENEDIOATE (1:1)
Common Name English
MIRTAZAPINE MALEATE, (S)-
Common Name English
ESMIRTAZAPINE MALEATE [USAN]
Common Name English
Classification Tree Code System Code
NCI_THESAURUS C29756
Created by admin on Mon Mar 31 18:07:48 GMT 2025 , Edited by admin on Mon Mar 31 18:07:48 GMT 2025
Code System Code Type Description
DRUG BANK
DBSALT001294
Created by admin on Mon Mar 31 18:07:48 GMT 2025 , Edited by admin on Mon Mar 31 18:07:48 GMT 2025
PRIMARY
PUBCHEM
6451144
Created by admin on Mon Mar 31 18:07:48 GMT 2025 , Edited by admin on Mon Mar 31 18:07:48 GMT 2025
PRIMARY
ChEMBL
CHEMBL1366933
Created by admin on Mon Mar 31 18:07:48 GMT 2025 , Edited by admin on Mon Mar 31 18:07:48 GMT 2025
PRIMARY
USAN
RR-49
Created by admin on Mon Mar 31 18:07:48 GMT 2025 , Edited by admin on Mon Mar 31 18:07:48 GMT 2025
PRIMARY
CAS
680993-85-5
Created by admin on Mon Mar 31 18:07:48 GMT 2025 , Edited by admin on Mon Mar 31 18:07:48 GMT 2025
PRIMARY
NCI_THESAURUS
C76940
Created by admin on Mon Mar 31 18:07:48 GMT 2025 , Edited by admin on Mon Mar 31 18:07:48 GMT 2025
PRIMARY
SMS_ID
100000174954
Created by admin on Mon Mar 31 18:07:48 GMT 2025 , Edited by admin on Mon Mar 31 18:07:48 GMT 2025
PRIMARY
FDA UNII
I2U18E6JKA
Created by admin on Mon Mar 31 18:07:48 GMT 2025 , Edited by admin on Mon Mar 31 18:07:48 GMT 2025
PRIMARY
Related Record Type Details
PARENT -> SALT/SOLVATE
PARENT -> SALT/SOLVATE
Related Record Type Details
ACTIVE MOIETY