has role mycotoxin sesquiterpenoid epoxide organic heteropolycyclic compound trichothecene 0 CHEBI:55517 [H][C@]12O[C@]3([H])[C@H]([*])[C@@H]([*])[C@@](C)(C33CO3)C1(C[*])C([*])C([*])C(C)=C2 229.12285 229.29430 C15H17O2R5 chebi_ontology trichothecenes Any one of a large family of chemically related mycotoxins with a structure based on a sesquiterpene skeleton. The most important structural features causing the biological activities of trichothecenes are a 12,13-epoxy ring, the presence of hydroxy or acetyl groups at appropriate positions on the trichothecene nucleus and the structure and position of the side-chain.