Cantharidin
A monoterpenoid with an epoxy-bridged cyclic dicarboxylic anhydride structure secreted by many species of blister beetle, and most notably by the Spanish fly, Lytta vesicatoria. Natural toxin inhibitor of protein phosphatases 1 and 2A. — ChEBI
Safety documents & references
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Identity & molecular properties
Source-linked values| CAS number | 56-25-7 | ChEBI ↗ |
| Molecular formula | C10H12O4 | ChEBI ↗ |
| Molar mass | 196.202 g/mol | ChEBI ↗ |
| Monoisotopic mass | 196.07356 Da | ChEBI ↗ |
| Formal charge | 0 | ChEBI ↗ |
| ChEBI identifier | CHEBI:64213 | ChEBI ↗ |
Cross-source molecular data
PubChem| Molar mass | 196.20 g/mol | PubChem ↗ |
| Exact mass | 196.07355886 Da | PubChem ↗ |
| Computed XLogP | 0.6 | PubChem ↗ |
| Topological polar surface area (Ų) | 52.6 | PubChem ↗ |
| H-bond donors | 0 | PubChem ↗ |
| H-bond acceptors | 4 | PubChem ↗ |
| Rotatable bonds | 0 | 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
Copy any identifiercantharidin(3aR,4S,7R,7aS)-3a,7a-dimethylhexahydro-4,7-epoxy-2-benzofuran-1,3-dioneDHZBEENLJMYSHQ-XCVPVQRUSA-NC[C@@]12C(=O)OC(=O)[C@]1(C)[C@H]1CC[C@@H]2O1InChI=1S/C10H12O4/c1-9-5-3-4-6(13-5)10(9,2)8(12)14-7(9)11/h5-6H,3-4H2,1-2H3/t5-,6+,9+,10-Names & synonyms
Names are supplied by ChEBI. Trade names and related synonyms may describe a broader product context.
Classification & relationships
ChEBI ontologyRoles recorded in ChEBI
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 massUses 196.202 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.
Elemental composition
Theoretical mass fractionsCOHCalculated 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 associationsSources & record history
Checked 27 Sep 2026Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0
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.