4'-Demethyleucomin

Modify Date: 2026-07-15 14:46:57

4'-Demethyleucomin Structure
4'-Demethyleucomin structure
Common Name 4'-Demethyleucomin
CAS Number 34818-83-2 Molecular Weight 284.263
Density 1.5±0.1 g/cm3 Boiling Point 588.3±50.0 °C at 760 mmHg
Molecular Formula C16H12O5 Melting Point N/A
MSDS N/A Flash Point 226.4±23.6 °C

Summary: (E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one, also known as 4'-Demethyleucomin, has a CAS number of 34818-83-2, with a molecular formula of C16H12O5 and a molecular weight of 284.263. It is a yellow powder with a boiling point of 588.3±50.0°C and a density of 1.5±0.1 g/cm3. For research-use only, not for medical or clinical usage.


 Names

This table lists Chinese names, IUPAC names and various aliases of this chemical substance.

Name (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one
Synonym More Synonyms

 Chemical & Physical Properties

This table shows physicochemical parameters including melting point, boiling point, density, solubility and optical rotation. Missing data is marked as N/A.

Density 1.5±0.1 g/cm3
Boiling Point 588.3±50.0 °C at 760 mmHg
Molecular Formula C16H12O5
Molecular Weight 284.263
Flash Point 226.4±23.6 °C
Exact Mass 284.068481
PSA 86.99000
LogP 3.06
Vapour Pressure 0.0±1.7 mmHg at 25°C
Index of Refraction 1.754
InChIKey PKCWSPYCHMNVKB-BJMVGYQFSA-N
SMILES O=C1C(=Cc2ccc(O)cc2)COc2cc(O)cc(O)c21

 Safety Information

This table covers safety warnings, protective measures, incompatible substances and disposal guidelines for this compound.

Hazard Codes Xi

 4'-DemethyleucominBioassay

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This table contains target information, in‑vitro & in‑vivo assay data for this compound.

Name: Cytotoxicity against human 92-1 cells assessed as reduction in cell number incubated ...
Source: ChEMBL
Target: N/A
External Id: CHEMBL4321506
Name: Antimicrobial activity against Staphylococcus aureus incubated for 4 days by broth mi...
Source: ChEMBL
Target: Staphylococcus aureus
External Id: CHEMBL3595057
Name: Cytotoxicity against human HT-29 cells assessed as reduction in cell growth incubated...
Source: ChEMBL
Target: HT-29
External Id: CHEMBL3595054
Name: Antiproliferative activity against HREC assessed as reduction in cell number incubate...
Source: ChEMBL
Target: N/A
External Id: CHEMBL4321504
Name: Inhibition of human recombinant MAO-A expressed in baculovirus infected BTI-TN-5B1-4 ...
Source: ChEMBL
Target: Amine oxidase [flavin-containing] A
External Id: CHEMBL1767515
Name: Antimicrobial activity against Candida albicans incubated for 4 days by broth microdi...
Source: ChEMBL
Target: Candida albicans
External Id: CHEMBL3595060
Name: Antimicrobial activity against Aspergillus niger incubated for 4 days by broth microd...
Source: ChEMBL
Target: Aspergillus niger
External Id: CHEMBL3595061
Name: Antimicrobial activity against Escherichia coli incubated for 4 days by broth microdi...
Source: ChEMBL
Target: Escherichia coli
External Id: CHEMBL3595058
Name: Antimicrobial activity against Mycobacterium smegmatis incubated for 4 days by broth ...
Source: ChEMBL
Target: Mycolicibacterium smegmatis
External Id: CHEMBL3595059
Name: Inhibition of MAO-B (unknown origin)
Source: ChEMBL
Target: Amine oxidase [flavin-containing] B
External Id: CHEMBL3097977
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 Synonyms

This table collects all English aliases, systematic names and CAS‑related synonyms of the compound.

(3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chromen-4-one
5,7-Dichlor-1-methyl-1,2-dihydro-3H-1,4-benzodiazepin-2-on
demethyleucomine
5,7-Dichlor-1-methyl-1,4-benzodiazepin-2-on
2H-1,4-Benzodiazepin-2-one,5,7-dichloro-1,3-dihydro-1-methyl

 4'-Demethyleucomin | FAQ

This section contains frequently‑asked‑questions about this compound, including basic parameters, properties, storage conditions and corresponding answers.

Q: What is the molecular weight of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one?
A: Molecular weight of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one is 284.263.
Q: What is the polar surface area (PSA) of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one?
A: Polar surface area (PSA) of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one is 86.99000.
Q: What is the English name of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one?
A: The English name of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one is (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one.
Q: What is the molecular formula of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one?
A: Molecular formula of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one is C16H12O5.
Q: What is the LogP of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one?
A: LogP of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one is 3.06.
Q: What is the CAS number of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one?
A: CAS number of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one is 34818-83-2.
Q: What is the SMILES notation of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one?
A: SMILES notation of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one is O=C1C(=Cc2ccc(O)cc2)COc2cc(O)cc(O)c21.
Q: What is the InChIKey of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one?
A: InChIKey of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one is PKCWSPYCHMNVKB-BJMVGYQFSA-N.
Q: What English synonyms does (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one have?
A: English synonyms of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one: (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chromen-4-one, 5,7-Dichlor-1-methyl-1,2-dihydro-3H-1,4-benzodiazepin-2-on, demethyleucomine, 5,7-Dichlor-1-methyl-1,4-benzodiazepin-2-on, 2H-1,4-Benzodiazepin-2-one,5,7-dichloro-1,3-dihydro-1-methyl.
Q: What is the boiling point of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one?
A: Boiling point of (3E)-5,7-Dihydroxy-3-(4-hydroxybenzylidene)-2,3-dihydro-4H-chrome n-4-one is 588.3±50.0 °C at 760 mmHg.

 4'-Demethyleucominfactory

This table lists manufacturers and suppliers of this compound, including vendor names and product supply reference information.

Shanghai Nianxing Industrial Co., Ltd
BioBioPha
Dayang Chem (Hangzhou) Co., Ltd.
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