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usnic acid

chemical compound
ChemicalSubstance type_of_chemical_entity Q425335
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usnic acid

Summary

usnic acid is a type of chemical entity[1]. It ranks in the top 6% of type_of_chemical_entity entities by monthly Wikipedia readership (86 views/month).[2]

Key Facts

  • usnic acid's instance of is recorded as type of chemical entity[3].
  • usnic acid's chemical structure is recorded as Usnic acid.svg[4].
  • usnic acid's CAS Registry Number is recorded as 125-46-2[5].
  • usnic acid's EC number is recorded as 204-740-7[6].
  • usnic acid's canonical SMILES is recorded as CC1=C(C(=C2C(=C1O)C3(C(=CC(=C(C3=O)C(=O)C)O)O2)C)C(=O)C)O[7].
  • usnic acid's InChI is recorded as InChI=1S/C18H16O7/c1-6-14(22)12(8(3)20)16-13(15(6)23)18(4)10(25-16)5-9(21)11(7(2)19)17(18)24/h5,21-23H,1-4H3[8].
  • usnic acid's InChIKey is recorded as WEYVVCKOOFYHRW-UHFFFAOYSA-N[9].
  • usnic acid's chemical formula is recorded as C₁₈H₁₆O₇[10].
  • usnic acid's subclass of is recorded as aromatic polyketide[11].
  • usnic acid's Commons category is recorded as Usnic acid[12].
  • usnic acid's MeSH descriptor ID is recorded as C073339[13].
  • usnic acid's has part is recorded as oxygen[14].
  • usnic acid's has part is recorded as carbon[15].
  • usnic acid's has part is recorded as hydrogen[16].
  • usnic acid's ChEMBL ID is recorded as CHEMBL242022[17].
  • usnic acid's Freebase ID is recorded as /m/0g51lv[18].
  • usnic acid's UNII is recorded as 0W584PFJ77[19].
  • usnic acid's ChemSpider ID is recorded as 22633[20].
  • usnic acid's PubChem CID is recorded as 24211[21].
  • usnic acid's ChEBI ID is recorded as 38319[22].
  • usnic acid's found in taxon is recorded as Parmelia[23].
  • usnic acid's found in taxon is recorded as Dolichousnea diffracta[24].
  • usnic acid's found in taxon is recorded as Usnea annulata[25].
  • usnic acid's found in taxon is recorded as Stereocaulon alpinum[26].
  • usnic acid's found in taxon is recorded as Usnea subcavata[27].

Why It Matters

usnic acid ranks in the top 6% of type_of_chemical_entity entities by monthly Wikipedia readership (86 views/month).[2] It has Wikipedia articles in 14 language editions, a strong signal of global cultural recognition.[28] It 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 . 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] ↑ . Medical Subject Headings. Retrieved . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . ChEMBL. Retrieved . wikidata.org.
  16. [18] ↑ . Freebase Data Dumps. wikidata.org.
  17. [19] ↑ . Global Substance Registration System. Retrieved . wikidata.org.
  18. [20] ↑ . Q2311683. Retrieved . wikidata.org.
  19. [21] ↑ . PubChem. Retrieved . wikidata.org.
  20. [22] ↑ . ChEMBL. Retrieved . wikidata.org.
  21. [23] ↑ . α-Acetylsalazinsäure (galbinsäure) aus Parmelia caraccensis. wikidata.org.
  22. [24] ↑ . Studies on Chilean Lichens, VII. The Phenolic Constituents of Protusnea malacea. wikidata.org.
  23. [25] ↑ . Studies on Chilean Lichens, VII. The Phenolic Constituents of Protusnea malacea. wikidata.org.
  24. [26] ↑ . Usimines A−C, Bioactive Usnic Acid Derivatives from the Antarctic Lichen Stereocaulon alpinum. wikidata.org.
  25. [27] ↑ . Cytotoxic Evaluation of Phenolic Compounds from Lichens against Melanoma Cells. 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). usnic acid. Retrieved May 3, 2026, from https://4ort.xyz/entity/usnic-acid
MLA “usnic acid.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/usnic-acid.
BibTeX @misc{4ortxyz_usnic-acid_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{usnic acid}}, year = {2026}, url = {https://4ort.xyz/entity/usnic-acid}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): usnic acid — https://4ort.xyz/entity/usnic-acid (retrieved 2026-05-03)

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