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D6942

Sigma-Aldrich

DK-AH 269

≥98% (HPLC), solid

Synonym(s):

(S)-(+)-7,8-Dimethoxy-3-[[1-(2-(3,4-dimethoxyphenyl)ethyl)-3-piperidinyl]methyl]-1,3,4,5-tetrahydro-2H-3-benzazepin-2-one hydrochloride, Cilobradine hydrochloride

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About This Item

Empirical Formula (Hill Notation):
C28H38N2O5 · HCl
CAS Number:
186097-54-1
Molecular Weight:
519.07
MDL number:
MFCD07776908
UNSPSC Code:
12352200
PubChem Substance ID:
24724467
NACRES:
NA.77

Quality Level

100

Assay

≥98% (HPLC)

form

solid

color

white

solubility

H2O: ~20 mg/mL

storage temp.

2-8°C

SMILES string

O=C1CC2=CC(OC)=C(OC)C=C2CCN1C[C@@H](CCC3)CN3CCC4=CC(OC)=C(OC)C=C4.[H]Cl

InChI

1S/C28H38N2O5.ClH/c1-32-24-8-7-20(14-25(24)33-2)9-12-29-11-5-6-21(18-29)19-30-13-10-22-15-26(34-3)27(35-4)16-23(22)17-28(30)31;/h7-8,14-16,21H,5-6,9-13,17-19H2,1-4H3;1H/t21-;/m0./s1

InChI key

MTAKUIYCCYKGJJ-BOXHHOBZSA-N

Application

DK-AH 269 has been used as a hyperpolarization-activated and cyclic nucleotide-gated channel (HCN) antagonist to study its effects on the inhibition of Ih in HCN-deficient hair cells of mice. It has also been used as an HCN blocker to study its effects on action potential firing in the suprachiasmatic nucleus (SCN) neurons.

Biochem/physiol Actions

DK-AH 269 is a bradycardiac agent.
DK-AH 269 (Cilobradine) is an HCN Channel blocker; an open channel blocker of neuronal Ih and related cardiac If channels.

Features and Benefits

This compound is a featured product for Cyclic Nucleotide research. Click here to discover more featured Cyclic Nucleotide products. Learn more about bioactive small molecules for other areas of research at sigma.com/discover-bsm.
This compound is featured on the Cyclic Nucleotide-Gated (CNG) and Hyperpolarization Activated Cyclic Nucleotide-Gated (HCN) Channels page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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A Raes et al.
British journal of pharmacology, 125(4), 741-750 (1998-12-01)
1. The sinus node inhibitors UL FS 49 and DK-AH 269 reduce heart rate by slowing diastolic depolarization rate in the sino-atrial (SA) node, which might originate from the use-dependent blockade of a hyperpolarization-activated current If. A hyperpolarization-activated current Ih
HCN channels expressed in the inner ear are necessary for normal balance function
Horwitz G C, et al.
The Journal of Neuroscience, 31(46), 16814-16825 (2011)
H C Pape
Neuroscience, 59(2), 363-373 (1994-03-01)
A class of pharmacologically active substances, known as "specific bradycardic agents", exerts a negative chronotropic influence on cardiac activity, which heavily relies upon a potent blockade of the hyperpolarization-activated cation current in Purkinje fibers. Since the cation conductance activated by
Effects of a bradycardic agent (DK-AH 269) on haemodynamics and oxygen consumption of isolated blood-perfused rabbit hearts
Granetzny A, et al.
Journal of Clinical and Basic Cardiology, 3(3), 191-196 (2000)
Vivien Chevaleyre et al.
Proceedings of the National Academy of Sciences of the United States of America, 99(14), 9538-9543 (2002-07-03)
Hyperpolarization-activated nonselective cation channels (Ih channels) play an important role in the control of membrane excitability and rhythmic neuronal activity. The functional relevance of presynaptic Ih channels in regulating synaptic function, however, is not well established. Recently, it has been
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