PROPIOMAZINE HYDROCHLORIDE

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Search structure


Trade Names	LARGON
Synonyms	Largon Propiomazine hcl Propiomazine hydrochloride
Status
Molecule Category	Salt-form
UNII	70BO17YR03
EPA CompTox	DTXSID80872383

Structure


InChI Key	UGVNGSMLNPWNNA-UHFFFAOYSA-N
Smiles	CCC(=O)c1ccc2c(c1)N(CC(C)N(C)C)c1ccccc1S2.Cl
InChI	InChI=1S/C20H24N2OS.ClH/c1-5-18(23)15-10-11-20-17(12-15)22(13-14(2)21(3)4)16-8-6-7-9-19(16)24-20;/h6-12,14H,5,13H2,1-4H3;1H

Physicochemical Descriptors

Property Name	Value
Molecular Formula	C20H25ClN2OS
Molecular Weight	376.95
AlogP	4.83
Hydrogen Bond Acceptor	4.0
Number of Rotational Bond	5.0
Polar Surface Area	23.55
Molecular species	NEUTRAL
Aromatic Rings	2.0
Heavy Atoms	24.0

Pharmacology

Mechanism of Action	Action	Reference
Histamine H1 receptor antagonist	ANTAGONIST	ISBN Wikipedia Wikipedia

Target Conservation


Protein: Histamine H1 receptor Description: Histamine H1 receptor Organism : Homo sapiens P35367 ENSG00000196639

Cross References

Resources	Reference
ChEBI	8492
ChEMBL	CHEMBL1201068
FDA SRS	70BO17YR03
KEGG	C07384
PubChem	71802
SureChEMBL	SCHEMBL141677

CONTENTS

EcoDrug+ was developed under the PREMIER Innovative Medicines Initiative 2 Joint Undertaking (JU) under grant agreement No 875508. The JU receives support from the EU’s Horizon 2020 research and innovation programme and the European Federation of Pharmaceutical Industries and Associations (EFPIA). The views reflect only the authors’ perspective and the JU is not responsible for any use that may be made of the information EcoDrug+ contains.

Elements of EcoDrug+ were developed under the Biocenter Finland Drug Discovery and Chemical Biology network. CSC-IT Center for Science Ltd is thanked for providing computational resources. Credit is given to Ensembl for collecting species images (provided under public domain licences such as Wikimedia and NHGRI).

Content of EcoDrug+ is provided without guarantee for correctness.

Cite Us:

Ashenafi Legehar, Siobhán Monaghan, Mael Briand, Akseli Niemelä, Leo Ghemtio, Ziaurrehman Tanoli, A Ross Brown, Charles R Tyler, Henri Xhaard, EcoDrug PLUS: an advanced database for drug target conservation analysis and environmental risk assessment, Nucleic Acids Research, 2025, gkaf1251 Read...

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Last update: Monday, 3 November 2025