Butinoline

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| ImageFile =Butinoline.svg

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| PIN =1,1-Diphenyl-4-(pyrrolidin-1-yl)but-2-yn-1-ol

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|Section1={{Chembox Identifiers

| CASNo =968-63-8

| UNII = G216926E9T

| PubChem =68943

| ChEMBL = 1442660

| ChemSpiderID = 62168

| InChI = 1/C20H21NO/c22-20(18-10-3-1-4-11-18,19-12-5-2-6-13-19)14-9-17-21-15-7-8-16-21/h1-6,10-13,22H,7-8,15-17H2

| InChIKey = LWPXJPFOEPMIRG-UHFFFAOYAV

| StdInChI = 1S/C20H21NO/c22-20(18-10-3-1-4-11-18,19-12-5-2-6-13-19)14-9-17-21-15-7-8-16-21/h1-6,10-13,22H,7-8,15-17H2

| StdInChIKey = LWPXJPFOEPMIRG-UHFFFAOYSA-N

| SMILES = C1CCN(C1)CC#CC(C2=CC=CC=C2)(C3=CC=CC=C3)O}}

|Section2={{Chembox Properties

| Formula =C₂₀H₂₁NO

| MolarMass =291.4 g/mol

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|Section3={{Chembox Hazards

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{{Context|date=March 2021}}{{More citations needed|date=March 2021}}

Butinoline (Azulone) is an anticholinergic drug used as an antispasmodic.{{cite book| vauthors = Ganellin CR, Triggle DJ, Macdonald F |title=Dictionary of Pharmacological Agents|url=https://books.google.com/books?id=DeX7jgInYFMC&pg=PA340|access-date=24 April 2012|year=1997|publisher=CRC Press|isbn=978-0-412-46630-4|page=340}}