BDBM6309 6-Acetyl-8-cyclopentyl-5-methyl-2-(5-piperazin-1-yl-pyridin-2-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one Hydrochloride::8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1-yl)pyridin-2-yl]amino}-7H,8H-pyrido[2,3-d]pyrimidin-7-one::Ibrance::PD 0332991::Palbociclib::Pyrido-[2,3-d]-pyrimidin-7-one 43::US10189849, PD0332991::US10464927, Compound Palbociclib::US10626107, Example Palbociclib::US10696682, Compound PD0332991::US10927120, PD0332991::US12312355, Compound Palbociclib::US20250066372, Example Palbociclib::US9464092, PD0332991::US9957276, PD0332991

SMILES CC1=C(C(=O)N(c2c1cnc(n2)Nc3ccc(cn3)N4CCNCC4)C5CCCC5)C(=O)C

InChI Key InChIKey=AHJRHEGDXFFMBM-UHFFFAOYSA-N

Data  10 KI  131 IC50  1 Kd

PDB links: 3 PDB IDs match this monomer.

  Tab Delimited (TSV)   2D SDfile   Computed 3D by Vconf -m prep SDfile
Find this compound or compounds like it in BindingDB:
   Substructure
Similarity at least:  must be >=0.5
Exact match

Activity Spreadsheet -- Enzyme Inhibition Constant Data from BindingDB

Found 142 hits for monomerid = 6309   

LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataKi:  0.200nMAssay Description:Inhibition of CDK6/cyclin D1 (unknown origin) assessed as reduction in substrate peptide phosphorylation using DYRKtide peptide as substrate preincub...More data for this Ligand-Target Pair
In Depth
Date in BDB:
4/20/2024
Entry Details
PubMed
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 0.430nMMore data for this Ligand-Target Pair
In Depth
Date in BDB:
10/13/2025
Entry Details
PubMed
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataKi:  0.800nMAssay Description:Inhibition of CDK4/cyclin D1 (unknown origin) assessed as reduction in substrate peptide phosphorylation using DYRKtide peptide as substrate preincub...More data for this Ligand-Target Pair
In Depth
Date in BDB:
4/20/2024
Entry Details
PubMed
TargetCyclin-dependent kinase 6/G1/S-specific cyclin-D1(Human)
Chia Tai Tianqing Pharmaceutical Group

US Patent
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 0.980nMAssay Description:The standard Lance Ultra method was performed by a 10 μL enzyme reaction system containing 0.3 nM CDK4/cyclin D1 protein, 50 nM ULight-4E-BP1 po...More data for this Ligand-Target Pair
In Depth
Date in BDB:
9/8/2023
Entry Details
Go to US Patent
PDB3D3D Structure (crystal)
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 0.990nMMore data for this Ligand-Target Pair
In Depth
Date in BDB:
10/12/2025
Entry Details
PubMed
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 1.30nMMore data for this Ligand-Target Pair
In Depth
Date in BDB:
10/13/2025
Entry Details
PubMed
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 2nMAssay Description:Inhibition of CDK4/cyclin D1 (unknown origin) using Rb as substrate after 60 mins by scintillation counting analysis in presence of [r-33P]ATPMore data for this Ligand-Target Pair
In Depth
Date in BDB:
2/6/2015
Entry Details Article
PubMed
TargetCyclin-dependent kinase 4/G1/S-specific cyclin-D3(Human)
Chengdu Cynogen Bio-Pharmaceutical Technology

US Patent
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 2.20nMMore data for this Ligand-Target Pair
In Depth
Date in BDB:
9/21/2025
Entry Details
Go to US Patent

LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataKi:  3nMAssay Description:Inhibition of CDK4/cyclin D1 (unknown origin) in presence of [gamma-33P]-ATP by KINOMEscan assayMore data for this Ligand-Target Pair
In Depth
Date in BDB:
9/5/2020
Entry Details Article
PubMed
TargetCyclin-dependent kinase 6/G1/S-specific cyclin-D1(Human)
Chia Tai Tianqing Pharmaceutical Group

US Patent
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 3nMAssay Description:Inhibition of CDK6/cyclin D1 (unknown origin)More data for this Ligand-Target Pair
In Depth
Date in BDB:
6/26/2023
Entry Details
PubMedPDB3D3D Structure (crystal)
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
In Depth
Date in BDB:
10/12/2025
Entry Details
PubMed
TargetCyclin-dependent kinase 4/G1/S-specific cyclin-D3(Human)
Chengdu Cynogen Bio-Pharmaceutical Technology

US Patent
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 3.20nMAssay Description:Inhibition of human full-length N-terminal GST tagged CDK6 (1 to 326 residues)/GST-tagged cyclinD3 (1 to 292 residues) expressed in baculovirus expre...More data for this Ligand-Target Pair
In Depth
Date in BDB:
3/29/2022
Entry Details Article
PubMed
TargetCyclin-dependent kinase 4/G1/S-specific cyclin-D3(Human)
Chengdu Cynogen Bio-Pharmaceutical Technology

US Patent
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 3.20nMAssay Description:Inhibition of recombinant human full-length N-terminal GST-fused CDK4 (1 to 303 residues)/GST-tagged CyclinD3 (1 to 292 residues) expressed in baculo...More data for this Ligand-Target Pair
In Depth
Date in BDB:
3/29/2022
Entry Details Article
PubMed
TargetCyclin-dependent kinase 4/G1/S-specific cyclin-D3(Human)
Chengdu Cynogen Bio-Pharmaceutical Technology

US Patent
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 3.40nMAssay Description:Inhibition of CDK4/Cyclin D3 (unknown origin) by mobility shift assayMore data for this Ligand-Target Pair
In Depth
Date in BDB:
8/20/2022
Entry Details Article
PubMed
TargetCyclin-dependent kinase 6/G1/S-specific cyclin-D1(Human)
Chia Tai Tianqing Pharmaceutical Group

US Patent
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 3.80nMAssay Description:Inhibition of CDK6/cyclinD1 (unknown origin)More data for this Ligand-Target Pair
In Depth
Date in BDB:
7/25/2014
Entry Details Article
PubMedPDB3D3D Structure (crystal)
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 4.80nMMore data for this Ligand-Target Pair
In Depth
Date in BDB:
10/12/2025
Entry Details
PubMed
TargetCyclin-dependent kinase 6/G1/S-specific cyclin-D3(Human)
Anhui Medical University

Curated by ChEMBL
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 5nMAssay Description:Inhibition of recombinant human full-length N-terminal His-tagged CDK6/cyclinD3 expressed in baculovirus infected Sf9 insect cells using histone H1 a...More data for this Ligand-Target Pair
In Depth
Date in BDB:
8/11/2021
Entry Details Article
PubMedPDB3D3D Structure (crystal)
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 5.10nMMore data for this Ligand-Target Pair
In Depth
Date in BDB:
10/13/2025
Entry Details
PubMed
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 5.23nMAssay Description:The standard Lance Ultra method was performed by a 10 μL enzyme reaction system containing 0.5 nM CDK2/cyclin A protein, 100 nM ULight-MBP polyp...More data for this Ligand-Target Pair
In Depth
Date in BDB:
9/8/2023
Entry Details
Go to US Patent

LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 5.40nMAssay Description:Inhibition of CDK4/cyclinD1 (unknown origin) using retinoblastoma as substrate after 30 mins by autoradiography in presence of [gamma-32P]ATPMore data for this Ligand-Target Pair
In Depth
Date in BDB:
7/25/2014
Entry Details Article
PubMed
TargetCyclin-dependent kinase 6/G1/S-specific cyclin-D3(Human)
Anhui Medical University

Curated by ChEMBL
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 5.80nMMore data for this Ligand-Target Pair
In Depth
Date in BDB:
9/21/2025
Entry Details
Go to US Patent
PDB3D3D Structure (crystal)
TargetStimulator of interferon genes protein(Human)
Purdue University

Curated by ChEMBL
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
In Depth
Date in BDB:
10/12/2025
Entry Details
PubMed
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 6.60nMAssay Description:Inhibition of CDK4/cyclin D1 (unknown origin)More data for this Ligand-Target Pair
In Depth
Date in BDB:
6/26/2023
Entry Details
PubMed
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 6.90nMMore data for this Ligand-Target Pair
In Depth
Date in BDB:
10/12/2025
Entry Details
PubMed
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
In Depth
Date in BDB:
10/13/2025
Entry Details
PubMed
TargetCyclin-dependent kinase 4(Human)
Emory University School of Medicine

Curated by ChEMBL
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 8.20nMAssay Description:Inhibition of CDK4 (unknown origin)More data for this Ligand-Target Pair
In Depth
Date in BDB:
3/22/2022
Entry Details Article
PubMed
TargetCyclin-dependent kinase 4(Human)
Emory University School of Medicine

Curated by ChEMBL
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 9nMAssay Description:Inhibition of CDK4 (unknown origin)More data for this Ligand-Target Pair
In Depth
Date in BDB:
2/20/2021
Entry Details Article
PubMed
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 10nMAssay Description:Inhibition of human CDK4/cyclin-D1 (unknown origin)More data for this Ligand-Target Pair
In Depth
Date in BDB:
8/14/2021
Entry Details Article
PubMed
TargetCyclin-dependent kinase 2/G1/S-specific cyclin-E1(Human)
G1 Therapeutics

US Patent
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 10nMAssay Description:Selected compounds disclosed herein were tested in CDK4/cyclinD1, CDK6/CycD3 CDK2/CycA and CDK2/cyclinE kinase assays by Nanosyn (Santa Clara, Calif....More data for this Ligand-Target Pair
In Depth
Date in BDB:
10/9/2017
Entry Details
Go to US Patent

LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 10nMAssay Description:Selected compounds disclosed herein were tested in CDK4/cyclinD1, CDK2/CycA and CDK2/cyclinE kinase assays by Nanosyn (Santa Clara, Calif.) to determ...More data for this Ligand-Target Pair
In Depth
Date in BDB:
12/4/2017
Entry Details
Go to US Patent

LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 10nMAssay Description:Compounds disclosed herein were tested for inhibition of CDK4/Cyclin D1 or CDK6/Cyclin D3 kinase in an assay based on the time-resolved fluorescence-...More data for this Ligand-Target Pair
In Depth
Date in BDB:
6/30/2025
Entry Details
Go to US Patent

TargetCyclin-dependent kinase 6/G1/S-specific cyclin-D3(Human)
Anhui Medical University

Curated by ChEMBL
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 10nMAssay Description:Inhibition of CDK6/Cyclin D3 (unknown origin) by mobility shift assayMore data for this Ligand-Target Pair
In Depth
Date in BDB:
8/20/2022
Entry Details Article
PubMedPDB3D3D Structure (crystal)
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 10nMAssay Description:Selected compounds disclosed herein were tested in CDK4/cyclinD1, CDK6/CycD3 CDK2/CycA and CDK2/cyclinE kinase assays by Nanosyn (Santa Clara, Calif....More data for this Ligand-Target Pair
In Depth
Date in BDB:
10/9/2017
Entry Details
Go to US Patent

LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 11nMAssay Description:The enzyme was assayed with substrate GST- retinoblastoma in the presence of 25 uM ATP/[gamma-32P] ATP. IC50 is the inhibitor concentration, which in...More data for this Ligand-Target Pair
In Depth
Date in BDB:
10/27/2005
Entry Details Article
PubMed
TargetCyclin-dependent kinase 4(Human)
Emory University School of Medicine

Curated by ChEMBL
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 11nMAssay Description:Inhibition of CDK4 (unknown origin)More data for this Ligand-Target Pair
In Depth
Date in BDB:
8/18/2020
Entry Details Article
PubMed
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 11nMAssay Description:Inhibition of CDK4/cyclin D1 (unknown origin)More data for this Ligand-Target Pair
In Depth
Date in BDB:
3/2/2021
Entry Details Article
PubMed
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 11nMMore data for this Ligand-Target Pair
In Depth
Date in BDB:
10/12/2025
Entry Details
PubMed
TargetCyclin-dependent kinase 4(Human)
Emory University School of Medicine

Curated by ChEMBL
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 11nMMore data for this Ligand-Target Pair
In Depth
Date in BDB:
10/12/2025
Entry Details
PubMed
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 11nMAssay Description:Inhibition of human CDK4/cyclin D (unknown origin) using FAM-labeled peptide and ATP as substrate preincubated for 10 mins followed by substrate addi...More data for this Ligand-Target Pair
In Depth
Date in BDB:
3/29/2022
Entry Details Article
PubMed
TargetCyclin-dependent kinase 4(Human)
Emory University School of Medicine

Curated by ChEMBL
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 11nMAssay Description:Inhibition of CDK4 (unknown origin)More data for this Ligand-Target Pair
In Depth
Date in BDB:
6/22/2023
Entry Details
PubMed
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 11nMAssay Description:Inhibition of CDK4/cyclin D1 (unknown origin) expressed in baculovirus infected insect cells using GST-tagged pRB (792 to 928 residues) as substrate ...More data for this Ligand-Target Pair
In Depth
Date in BDB:
7/2/2018
Entry Details Article
PubMed
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 11nMMore data for this Ligand-Target Pair
In Depth
Date in BDB:
10/13/2025
Entry Details
PubMed
TargetCyclin-dependent kinase 4(Human)
Emory University School of Medicine

Curated by ChEMBL
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 11nMAssay Description:Inhibition of CDK4More data for this Ligand-Target Pair
In Depth
Date in BDB:
6/13/2011
Entry Details Article
PubMed
TargetCyclin-dependent kinase 4(Human)
Emory University School of Medicine

Curated by ChEMBL
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 11nMAssay Description:Inhibition of CDK4 (unknown origin)More data for this Ligand-Target Pair
In Depth
Date in BDB:
4/19/2024
Entry Details
PubMed
TargetCyclin-dependent kinase 4(Human)
Emory University School of Medicine

Curated by ChEMBL
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 11nMAssay Description:Inhibition of CDK4 in human MOLM13 cells assessed as inhibition of Rb phosphorylation at Ser780 after 24 hrsMore data for this Ligand-Target Pair
In Depth
Date in BDB:
2/6/2015
Entry Details Article
PubMed
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 11nMAssay Description:Inhibition of CDK4/cyclinD1 (unknown origin)More data for this Ligand-Target Pair
In Depth
Date in BDB:
7/25/2014
Entry Details Article
PubMed
TargetCyclin-dependent kinase 4(Human)
Emory University School of Medicine

Curated by ChEMBL
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 11nMAssay Description:Inhibition of CDK4 (unknown origin)More data for this Ligand-Target Pair
In Depth
Date in BDB:
6/24/2023
Entry Details
PubMed
TargetCyclin-dependent kinase 4(Human)
Emory University School of Medicine

Curated by ChEMBL
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 11nMAssay Description:Inhibition of CDK4 (unknown origin)More data for this Ligand-Target Pair
In Depth
Date in BDB:
6/22/2023
Entry Details
PubMed
TargetCyclin-dependent kinase 6/G1/S-specific cyclin-D1(Human)
Chia Tai Tianqing Pharmaceutical Group

US Patent
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 12nMAssay Description:Inhibition of CDK6/cyclin-D1 (unknown origin) in presence of ATP by time resolved-FRET assayMore data for this Ligand-Target Pair
In Depth
Date in BDB:
6/18/2023
Entry Details
PubMedPDB3D3D Structure (crystal)
LigandPNGBDBM6309(8-cyclopentyl-6-acetyl-5-methyl-2-{[5-(piperazin-1...)
Affinity DataIC50: 13nMAssay Description:Inhibition of GST-tagged CDK4/cyclin D1 (unknown origin) expressed in Baculovirus infected Sf9 cells using RPPTLSPIPHIPR peptide as substrate in pres...More data for this Ligand-Target Pair
In Depth
Date in BDB:
2/18/2021
Entry Details Article
PubMed
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