KNK 437 (Heat Shock Protein Inhibitor I) - ≥98% , CAS No.218924-25-5

CAS: 218924-25-5 Cat. No.: K276031 Molecular Weight: 245.23
AVAILABLE TO ORDER
GRADE & PURITY ≥98%
Synonyms
(3E)-3-(1,3-Benzodioxol-5-ylmethylidene)-2-oxopyrrolidine-1-carbaldehyde | A899531 | KNK437 | 3-((2H-1,3-BENZODIOXOL-5-YL)METHYLIDENE)-2-OXOPYRROLIDINE-1-CARBALDEHYDE | AS-72508 | 1-Pyrrolidinecarboxaldehyde, 3-(1,3-benzodioxol-5-ylmethylene)-2-oxo- | (E)
Storage
Store at -20°C,Desiccated
Shipped In
Ice chest + Ice pads
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
5mg
K276031-5mg
2

$44.90

$67.90
Save $23.00 (33.87%)
10mg
K276031-10mg
2

$56.90

$85.90
Save $29.00 (33.76%)
25mg
K276031-25mg
2

$74.90

$112.90
Save $38.00 (33.66%)
50mg
K276031-50mg
2

$92.90

$139.90
Save $47.00 (33.60%)
100mg
K276031-100mg
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.

$124.90

$187.90
Save $63.00 (33.53%)
250mg
K276031-250mg
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.

$187.90

$281.90
Save $94.00 (33.35%)
1g
K276031-1g
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.

$466.90

$700.90
Save $234.00 (33.39%)
Enter a quantity for the sizes you want to add.
🧪

Why this grade

≥98% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Store at -20°C,Desiccated Ships Ice chest + Ice pads Check lot-specific COA for exact specifications.

📋

Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

📚

Literature proof

Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

Product Application:
KNK437 has been used: as a heat shock factor 1 (HSF1) inhibitor to study its effects on the inhibition of viability and apoptosis activation in chemoresistant mice cells as an HSF1 inhibitor to study its effects on viability and apoptosis of colorectal cancer cells as a heat shock protein 70 (HSP70) inhibitor to study its effects on glutamine-induced HSP70 and inflammatory mediator release

Specifications

Synonyms
(3E)-3-(1, 3-Benzodioxol-5-ylmethylidene)-2-oxopyrrolidine-1-carbaldehyde | A899531 | KNK437 | 3-((2H-1, 3-BENZODIOXOL-5-YL)METHYLIDENE)-2-OXOPYRROLIDINE-1-CARBALDEHYDE | AS-72508 | 1-Pyrrolidinecarboxaldehyde, 3-(1, 3-benzodioxol-5-ylmethylene)-2-oxo- | (E)
Specifications & Purity
≥98%
Biochemical and Physiological Mechanisms
KNK437 inhibits the accumulation of heat shock proteins (including hsp -27, -40, -70, -72 and -105). KNK437 inhibits thermotolerance in cells with greater potency than quercetin. KNK437 is a benzylidene lactam compound.
Storage
Store at -20°C, Desiccated
Shipped In
Ice chest + Ice pads
This product requires cold chain shipping. Ground and other economy services are not available.
Note
Need more advice on solubility, usage and handling? Please visit our frequently asked questions (FAQ) page for more details.
Purity
≥98%
Names and Identifiers
Pubchem Sid504770675
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/504770675
Canonical SmilesC1CN(C(=O)C1=CC2=CC3=C(C=C2)OCO3)C=O
IUPAC Name(3E)-3-(1,3-benzodioxol-5-ylmethylidene)-2-oxopyrrolidine-1-carbaldehyde
InChIKeyLZGGUFLRKIMBDQ-BJMVGYQFSA-N
INCHI1S/C13H11NO4/c15-7-14-4-3-10(13(14)16)5-9-1-2-11-12(6-9)18-8-17-11/h1-2,5-7H,3-4,8H2/b10-5+
Isomeric SMILES C\1CN(C(=O)/C1=C/C2=CC3=C(C=C2)OCO3)C=O
Molecular Weight 245.23
Reaxy-Rn 15489492
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=15489492&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganoheterocyclic compounds
ClassBenzodioxoles
SubclassNot available
Intermediate Tree Nodes Not available
Direct ParentBenzodioxoles
Alternative Parents Pyrrolidine-2-ones  N-substituted carboxylic acid imides  Benzenoids  Dicarboximides  Lactams  Oxacyclic compounds  Azacyclic compounds  Acetals  Organopnictogen compounds  Organonitrogen compounds  Organic oxides  Hydrocarbon derivatives  Carbonyl compounds  
Molecular FrameworkAromatic heteropolycyclic compounds
Substituents Benzodioxole - Carboxylic acid imide, n-substituted - Pyrrolidone - 2-pyrrolidone - Benzenoid - Carboxylic acid imide - Dicarboximide - Pyrrolidine - Lactam - Acetal - Carboxylic acid derivative - Azacycle - Oxacycle - Organic oxide - Organopnictogen compound - Organic nitrogen compound - Organooxygen compound - Organonitrogen compound - Organic oxygen compound - Carbonyl group - Hydrocarbon derivative - Aromatic heteropolycyclic compound
DescriptionThis compound belongs to the class of organic compounds known as benzodioxoles. These are organic compounds containing a benzene ring fused to either isomers of dioxole. Dioxole is a five-membered unsaturated ring of two oxygen atoms and three carbon atoms.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

8 results found

Lot NumberCertificate TypeDateItem
L2108724Certificate of AnalysisJun 11, 2026 K276031
L2108725Certificate of AnalysisJun 11, 2026 K276031
L2109132Certificate of AnalysisJun 11, 2026 K276031
L2109133Certificate of AnalysisJun 11, 2026 K276031
L2109134Certificate of AnalysisJun 11, 2026 K276031
L2109140Certificate of AnalysisJun 11, 2026 K276031
B2602062Certificate of AnalysisMar 02, 2026 K276031
L2109131Certificate of AnalysisSep 09, 2025 K276031
Chemical and Physical Properties
SolubilitySoluble in DMSO to 50 mM
Molecular Weight245.230 g/mol
XLogP31.500
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count4
Rotatable Bond Count1
Exact Mass245.069 Da
Monoisotopic Mass245.069 Da
Topological Polar Surface Area55.800 Ų
Heavy Atom Count18
Formal Charge0
Complexity392.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count1
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds1
Covalently-Bonded Unit Count1
Solution Calculators
Reviews

Customer Reviews

Shall we send you a message when we have discounts available?

Remind me later

Thank you! Please check your email inbox to confirm.

Oops! Notifications are disabled.