ATROPINE


Trade Names	ATROPEN ATROPINE ATROPINE (AUTOINJECTOR)
Synonyms	Atroject Atropen Atrophate Atropine Atropine (autoinjector) Atropinum Dl-hyoscyamine Isopto Atropine
Status
Molecule Category	Free-form
ATC	A03BA01 S01FA01
UNII	7C0697DR9I
EPA CompTox	DTXSID4020113

Structure


InChI Key	RKUNBYITZUJHSG-SPUOUPEWSA-N
Smiles	CN1[C@@H]2CC[C@H]1C[C@@H](OC(=O)C(CO)c1ccccc1)C2
InChI	InChI=1S/C17H23NO3/c1-18-13-7-8-14(18)10-15(9-13)21-17(20)16(11-19)12-5-3-2-4-6-12/h2-6,13-16,19H,7-11H2,1H3/t13-,14+,15+,16?

Physicochemical Descriptors

Property Name	Value
Molecular Formula	C17H23NO3
Molecular Weight	289.37
AlogP	1.93
Hydrogen Bond Acceptor	4.0
Hydrogen Bond Donor	1.0
Number of Rotational Bond	4.0
Polar Surface Area	49.77
Molecular species	BASE
Aromatic Rings	1.0
Heavy Atoms	21.0

Pharmacology

Mechanism of Action	Action	Reference
Muscarinic acetylcholine receptor M1 antagonist	ANTAGONIST	Wikipedia FDA ISBN

Targets	EC50(nM)	IC50(nM)	Kd(nM)	Ki(nM)	Inhibition(%)
Enzyme Hydrolase	-	-	-	0.35-0.7	-
Ion channel Voltage-gated ion channel Voltage-gated sodium channel	-	-	-	-	4.5
Membrane receptor Family A G protein-coupled receptor Small molecule receptor (family A GPCR) Monoamine receptor Acetylcholine receptor	-	0.48-8.128	0.63-2.7	0.12-18.62	-
Transporter Electrochemical transporter SLC superfamily of solute carriers SLC22 family of organic cation and anion transporters	-	-	-	-	76.5

	EC50(nM)	IC50(nM)	Kd(nM)	Ki(nM)	Inhibition(%)
Bos taurus	-	-	-	0.2	-
Cavia porcellus	-	-	0.7762-3.981	0.32-2.49	4.5
Cricetulus griseus	-	-	-	0.329-0.344	-
Homo sapiens	-	8.128-470	-	0.21-18.62	76.5
Mus musculus	-	-	-	0.35-3.981	-
Rattus norvegicus	0.98	0.48-51	0.63-2.7	0.12-7.5	5.9

Target Conservation


Protein: Muscarinic acetylcholine receptor M2 Description: Muscarinic acetylcholine receptor M2 Organism : Homo sapiens P08172 ENSG00000181072










Protein: Muscarinic acetylcholine receptor M1 Description: Muscarinic acetylcholine receptor M1 Organism : Homo sapiens P11229 ENSG00000168539










Protein: Muscarinic acetylcholine receptor M3 Description: Muscarinic acetylcholine receptor M3 Organism : Homo sapiens P20309 ENSG00000133019

Related Entries

Cross References

Resources	Reference
ChEBI	78734
ChEMBL	CHEMBL517712
DrugBank	DB00572
DrugCentral	260
FDA SRS	7C0697DR9I
Human Metabolome Database	HMDB0014712
Guide to Pharmacology	320
KEGG	C01479
SureChEMBL	SCHEMBL2812

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