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Oncology and immunology drugs

Palbociclib

Also known as Ibrance, PD 0332991, 6-acetyl-8-cyclopentyl-5-methyl-2-((5-(piperazin-1-yl)pyridin-2-yl)amino)pyrido[2,3-d]pyrimidin-7(8H)-one

CAS 571190-30-2Formula C24H29N7O2Molar mass 447.54 g/molEC 804-556-2
GHS signal word: Danger. Pictograms: Acute toxicity (severe) 126 suppliers listed Drug substance
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Palbociclib chemical structure, C24H29N7O2, CAS 571190-30-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
571190-30-2
Formula
C24H29N7O2
Molar mass
447.54 g/mol
EC number
804-556-2
HS code
293359
Category
Oncology and immunology drugs

What is Palbociclib?

Plain description, key identifiers and synonyms

Palbociclib is a member of the class of pyridopyrimidines that is 2-{[5-(piperazin-1-yl)pyridin-2-yl]amino}pyrido[2,3-d]pyrimidin-7-one bearing additional methyl, acetyl and cyclopentyl substituents at positions 5, 6 and 8 respectively. It is used in combination with letrozole for the treatment of metastatic breast cancer. It has a role as an antineoplastic agent and an EC 2.7.11.22 (cyclin-dependent kinase) inhibitor. It is a member of cyclopentanes, a member of piperidines, an aminopyridine, a pyridopyrimidine, a secondary amino compound, a tertiary amino compound and an aromatic ketone.

Palbociclib is a drug for the treatment of ER-positive and HER2-negative breast cancer developed by Pfizer.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
6-acetyl-8-cyclopentyl-5-methyl-2-[(5-piperazin-1-yl-2-pyridinyl)amino]pyrido[2,3-d]pyrimidin-7-one
CAS number
571190-30-2 CAS number cross-checkedOther or deprecated CAS: 827022-33-3
EC numbers
804-556-2, 810-186-2
Molecular formula
C24H29N7O2
UNII
G9ZF61LE7G
MDL number
MFCD11840850
InChIKey
AHJRHEGDXFFMBM-UHFFFAOYSA-N
InChI
InChI=1S/C24H29N7O2/c1-15-19-14-27-24(28-20-8-7-18(13-26-20)30-11-9-25-10-12-30)29-22(19)31(17-5-3-4-6-17)23(33)21(15)16(2)32/h7-8,13-14,17,25H,3-6,9-12H2,1-2H3,(H,26,27,28,29)
SMILES (canonical and isomeric)
CC1=C(C(=O)N(C2=NC(=NC=C12)NC3=NC=C(C=C3)N4CCNCC4)C5CCCC5)C(=O)C

Synonyms

  • Ibrance
  • PD 0332991
  • 6-acetyl-8-cyclopentyl-5-methyl-2-((5-(piperazin-1-yl)pyridin-2-yl)amino)pyrido[2,3-d]pyrimidin-7(8H)-one
  • PD 332991
  • 6-Acetyl-8-cyclopentyl-5-methyl-2-(5-piperazin-1-ylpyridin-2-ylamino)-8H-pyrido(2,3-d)pyrimidin-7-one
  • 6-Acetyl-8-cyclopentyl-5-methyl-2-[[5-(piperazin-1-yl)pyridin-2-yl]amino]-8H-pyrido[2,3-d]pyrimidin-7-one
  • 6-acetyl-8-cyclopentyl-5-methyl-2-{[5-(piperazin-1-yl)pyridin-2-yl]amino}pyrido[2,3-d]pyrimidin-7(8H)-one
  • Pyrido[2,3-d]pyrimidin-7(8H)-one, 6-acetyl-8-cyclopentyl-5-methyl-2-[[5-(1-piperazinyl)-2-pyridinyl]amino]-
  • Pyrido(2,3-d)pyrimidin-7(8H)-one, 6-acetyl-8-cyclopentyl-5-methyl-2-((5-(1-piperazinyl)-2-pyridinyl)amino)-
  • palbociclibum
  • 6-Acetyl-8-cyclopentyl-5-methyl-2-((5-(piperazin-1-yl)pyridin-2-yl)amino)-8H-pyrido(2,3-d)pyrimidin-7-one
  • 6-acetyl-8-cyclopentyl-5-methyl-2-((5-(piperazin-1-yl)pyridin-2-yl)amino)pyrido(2,3-d)pyrimidin-7(8H)-one
  • 6-acetyl-8-cyclopentyl-5-methyl-2-((5-piperazin-1-ylpyridin-2-yl)amino)pyrido(6,5-d)pyrimidin-7-one
  • 6-acetyl-8-cyclopentyl-5-methyl-2-[(5-piperazin-1-ylpyridin-2-yl)amino]pyrido[6,5-d]pyrimidin-7-one
  • PD 991
  • 6-Acetyl-8-cyclopentyl-5-methyl-2-[(5-piperazin-1-ylpyridin-2-yl)amino]pyrido[2,3-d]pyrimidin-7(8H)-one
  • Palbociclib(PD0332991)
  • LQQ
  • Palbociclib free base
  • 2euf
  • 6-acetyl-8-cyclopentyl-5-methyl-2-[(5-piperazin-1-yl-2-pyridinyl)amino]pyrido[2,3-d]pyrimidin-7-one
  • 571190-30-2 (free base)
  • Palbociclib?
  • Palbociclib base
  • 6-Acetyl-8-cyclopentyl-5-methyl-2-[[5-(1-piperazinyl)-2-pyridinyl]amino]pyrido[2,3-d]pyrimidin-7(8H)-one
Show all 33 synonyms
  • 6-Acetyl-8-cyclopentyl-5-methyl-2-{[5-(1-piperazinyl)-2-pyridinyl]amino}pyrido[2,3-d]pyrimidin-7(8H)-one
  • Ibrance (TN)
  • Kinome_3823
  • Kinome_3824
  • Palbociclib (Standard)
  • 6-acetyl-8-cyclopentyl-5-methyl-2-(5-piperazin-1-yl-pyridin-2-ylamino)-8h-pyrido[2,3-d]pyrimidin-7-one hydrochloride
  • Palbociclib (JAN/USAN)
  • PFE-PKIS 32

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
447.54 g/molcalc.
Exact mass
447.2383 Dacalc.
LogP (octanol/water)
2.97calc.
Topological polar surface area
105 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
8calc.
Rotatable bonds
5calc.
Heavy atoms
33calc.
Rings
5calc.
Aromatic rings
3calc.
Fraction sp3 carbons
0.46calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=c1ccc2cnc(Nc3ccc(N4CCNCC4)cn3)nc2n1C1CCCC1

O=c1ccc2cnc(Nc3ccc(N4CCNCC4)cn3)nc2n1C1CCCC1

5 rings, 29 atoms.

60 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)

Hazard statements

  • H301Toxic if swallowed.
Precautionary statements (7)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Palbociclib suppliers

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All 126 suppliers
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Where suppliers are based

126 suppliers in 20 countries

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Palbociclib price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Pharmacological actions

  • Antineoplastic Agents
  • Protein Kinase Inhibitors

Roles

  • antimicrobial agent
  • antineoplastic agent
  • antiviral agent
  • enzyme inhibitor
  • pharmaceutical
  • protective agent
  • protein kinase inhibitor
  • renoprotective agent

Pharmacology

Palbociclib is a Kinase Inhibitor. The mechanism of action of palbociclib is as a Kinase Inhibitor and Cytochrome P450 3A Inhibitor.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • Active ingredient in FDA approved drug labels

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Palbociclib is traded under.

HS 2933.59Indicative HS code

Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring, other

World exports in 2024
$18.4B
+10.5% vs 2023, imports $24.8B
2019 to 2024
Top exporters
  1. Ireland43.6%
  2. Switzerland * partner reported26.3%
  3. China7.9%
Top importers
  1. Slovenia30.3%
  2. United States30.1%
  3. Germany15.3%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Palbociclib is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Palbociclib, based on the data on this page

What is Palbociclib?

Palbociclib is a member of the class of pyridopyrimidines that is 2-{[5-(piperazin-1-yl)pyridin-2-yl]amino}pyrido[2,3-d]pyrimidin-7-one bearing additional methyl, acetyl and cyclopentyl substituents at positions 5, 6 and 8 respectively.

What is the CAS number of Palbociclib?

The CAS registry number of Palbociclib is 571190-30-2. Other or deprecated CAS numbers: 827022-33-3.

What is the molecular formula and weight of Palbociclib?

The molecular formula of Palbociclib is C24H29N7O2 and its molar mass is 447.54 g/mol.

What is Palbociclib used for?

Known uses and roles of Palbociclib include anticancer drugs in pharmaceuticals, biochemical and pharmacological tools in research and laboratory, antimicrobial agent, antineoplastic agent, antiviral agent and 7 more.

Is Palbociclib hazardous?

Palbociclib carries the GHS signal word "Danger". Main hazards: toxic if swallowed. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Palbociclib?

Palbociclib is usually classified under HS code 293359 (Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Palbociclib?

CompoundList lists 126 suppliers of Palbociclib in China, United States, India, Germany and 16 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Palbociclib in India?

18 suppliers in India list Palbociclib on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Palbociclib?

Suppliers quote Palbociclib on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Palbociclib

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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