Chemical substance record

Physcion

521-61-9C₁₆H₁₂O₅284.267 g/mol

Organic/Inorganic Small MoleculeChEBI source record

A dihydroxyanthraquinone that is 9,10-anthraquinone bearing hydroxy substituents at positions 1 and 8, a methoxy group at position 3, and a methyl group at position 6. It has been widely isolated and characterised from both terrestrial and marine sources. — ChEBI

Safety references

Safety documents & references

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Identity & molecular properties

Source-linked values

CAS number	521-61-9	ChEBI ↗
Molecular formula	C₁₆H₁₂O₅	ChEBI ↗
Molar mass	284.267 g/mol	ChEBI ↗
Monoisotopic mass	284.06847 Da	ChEBI ↗
Formal charge	0	ChEBI ↗
ChEBI identifier	CHEBI:38167	ChEBI ↗

Cross-source molecular data

PubChem

Molar mass	284.26 g/mol	PubChem ↗
Exact mass	284.06847348 Da	PubChem ↗
Computed XLogP	3	PubChem ↗
Topological polar surface area (Å²)	83.8	PubChem ↗
H-bond donors	2	PubChem ↗
H-bond acceptors	5	PubChem ↗
Rotatable bonds	1	PubChem ↗

PubChem computed values are shown separately from the ChEBI record. An exact InChIKey match was used to connect the records. Molecular descriptors do not describe a supplied product’s purity, particle size or performance.

Names & structural identifiers

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Source preferred name

physcion

IUPAC name

1,8-dihydroxy-3-methoxy-6-methylanthracene-9,10-dione

InChIKey

FFWOKTFYGVYKIR-UHFFFAOYSA-N

SMILES

COc1cc(O)c2c(c1)C(=O)c1cc(C)cc(O)c1C2=O

InChI

InChI=1S/C16H12O5/c1-7-3-9-13(11(17)4-7)16(20)14-10(15(9)19)5-8(21-2)6-12(14)18/h3-6,17-18H,1-2H3

Names & synonyms

1,8-dihydroxy-3-methoxy-6-methylanthracene-9,10-dione

Names are supplied by ChEBI. Trade names and related synonyms may describe a broader product context.

Classification & relationships

ChEBI ontology

dihydroxyanthraquinoneChEBI parent class · 37484 ↗

ketone phenols organic molecular entity

Roles recorded in ChEBI

metaboliteantibacterial agentantineoplastic agentantifungal agenthepatoprotective agentanti-inflammatory agentapoptosis inducer

Database role annotations describe reported biological or chemical roles; they are not product approvals or recommendations for use.

Mass ↔ amount of substance

Calculated from sourced mass

Amount

Input unit

Equivalent amount

0.00351782 mol

Uses 284.267 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.

Elemental composition

Theoretical mass fractions

C

Carbon · 16 atoms

67.60%

O

Oxygen · 5 atoms

28.14%

H

Hydrogen · 12 atoms

4.26%

Calculated theoretical mass fractions from the reported formula and PubChem periodic-table atomic masses. These are not assay or purity results.

Research & patent references

Selected source associations

Antimutagenicity and cytotoxicity of the constituents from the aerial parts of Rumex acetosa. ↗Biological & pharmaceutical bulletin · 2005 Nov · PMID 16272711

Anti-HIV-1 constituents from leaves and twigs of Cratoxylum arborescens. ↗Planta medica · 2006 Dec · PMID 17091434

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Sources & record history

Checked 27 Sep 2026

Identity, formula, mass, synonyms & ontologyEMBL-EBI ChEBI · CHEBI:38167

Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0

Additional molecular descriptorsNCBI PubChem · CID 10639 · retrieved 2026-09-27

PubCAS formats source data, connects references and computes explicitly labelled conversions. CAS cross-references are supplied by ChEBI; they do not constitute CAS verification or endorsement.

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