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rhein

chemical compound
ChemicalSubstance type_of_chemical_entity Q720356
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Summary

rhein is a type of chemical entity[1]. rhein ranks in the top 6% of type_of_chemical_entity entities by monthly Wikipedia readership (22 views/month).[2]

Key Facts

  • rhein's instance of is recorded as type of chemical entity[3].
  • rhein's chemical structure is recorded as Cassic acid.svg[4].
  • rhein's CAS Registry Number is recorded as 478-43-3[5].
  • rhein's EC number is recorded as 207-521-4[6].
  • rhein's canonical SMILES is recorded as C1=CC2=C(C(=C1)O)C(=O)C3=C(C=C(C=C3C2=O)C(=O)O)O[7].
  • rhein's InChI is recorded as InChI=1S/C15H8O6/c16-9-3-1-2-7-11(9)14(19)12-8(13(7)18)4-6(15(20)21)5-10(12)17/h1-5,16-17H,(H,20,21)[8].
  • rhein's InChIKey is recorded as FCDLCPWAQCPTKC-UHFFFAOYSA-N[9].
  • rhein's chemical formula is recorded as C₁₅H₈O₆[10].
  • rhein's subclass of is recorded as anthraquinones[11].
  • rhein's subclass of is recorded as aromatic polyketide[12].
  • rhein's Commons category is recorded as Cassic acid[13].
  • rhein's MeSH descriptor ID is recorded as C020491[14].
  • rhein's ChEMBL ID is recorded as CHEMBL418068[15].
  • rhein's PDB structure ID is recorded as 3R2A[16].
  • rhein's PDB structure ID is recorded as 4RFR[17].
  • rhein's PDB structure ID is recorded as 4IE7[18].
  • rhein's Freebase ID is recorded as /m/0cmc4xq[19].
  • rhein's UNII is recorded as YM64C2P6UX[20].
  • rhein's RTECS number is recorded as CA9516000[21].
  • rhein's ChemSpider ID is recorded as 9762[22].
  • rhein's PubChem CID is recorded as 10168[23].
  • rhein's KEGG ID is recorded as C10401[24].
  • rhein's ChEBI ID is recorded as 8825[25].
  • rhein's found in taxon is recorded as Rheum undulatum[26].
  • rhein's found in taxon is recorded as Rheum franzenbachii[27].

Why It Matters

rhein ranks in the top 6% of type_of_chemical_entity entities by monthly Wikipedia readership (22 views/month).[2] rhein has Wikipedia articles in 5 language editions, a strong signal of global cultural recognition.[28] rhein is known by 7 alternative names across languages and contexts.[29]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . Global Substance Registration System. Retrieved . commonchemistry.cas.org. Provenance: wikidata.org.
  4. [6] ↑ . Global Substance Registration System. Retrieved . wikidata.org.
  5. [7] ↑ . PubChem. Retrieved . wikidata.org.
  6. [8] ↑ . PubChem. Retrieved . wikidata.org.
  7. [9] ↑ . PubChem. Retrieved . wikidata.org.
  8. [10] ↑ . PubChem. Retrieved . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . Medical Subject Headings. Retrieved . wikidata.org.
  13. [15] ↑ . ChEMBL. Retrieved . wikidata.org.
  14. [16] ↑ . Protein Data Bank. Retrieved . wikidata.org.
  15. [17] ↑ . Protein Data Bank. Retrieved . wikidata.org.
  16. [18] ↑ . Protein Data Bank. Retrieved . wikidata.org.
  17. [19] ↑ . wikidata.org.
  18. [20] ↑ . Global Substance Registration System. Retrieved . wikidata.org.
  19. [21] ↑ . wikidata.org.
  20. [22] ↑ . ChemSpider. Retrieved . wikidata.org.
  21. [23] ↑ . PubChem. Retrieved . wikidata.org.
  22. [24] ↑ . ChEBI. Retrieved . wikidata.org.
  23. [25] ↑ . ChEMBL. Retrieved . wikidata.org.
  24. [26] ↑ . Ethnopharmacologic study of Chinese rhubarb. wikidata.org.
  25. [27] ↑ . Analysis of anthraquinones inRheum franzenbachii Münt (rhubarb) by thin-layer chromatography. wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [28] ↑ . Wikidata sitelinks. wikidata.org.
  3. [29] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). rhein. Retrieved October 13, 2026, from https://4ort.xyz/entity/rhein
MLA “rhein.” 4ort.xyz Knowledge Graph, 4ort.xyz, 13 Oct. 2026, https://4ort.xyz/entity/rhein.
BibTeX @misc{4ortxyz_rhein_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{rhein}}, year = {2026}, url = {https://4ort.xyz/entity/rhein}, note = {Accessed: 2026-10-13}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): rhein — https://4ort.xyz/entity/rhein (retrieved 2026-10-13)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 23w ago · Shuaib-bot bot · 2026-05-02 view diff on Wikidata ↗
    Found in taxon → Rheum undulatum, Rheum franzenbachii, Rheum hotaoense +51
    Subject has role → enzyme inhibitor
    Instance of → type of chemical entity
    Subclass of → anthraquinones, aromatic polyketide
    + 4 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update-languages-and-other-short:0||ur */"
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