rotenoid rotenoids CHEBI:71543 chebi_ontology Members of the class of tetrahydrochromenochromene that consists of a <i>cis</i>-fused tetrahydrochromeno[3,4-<em>b</em>]chromene skeleton and its substituted derivatives. The term was originally restricted to natural products, but is now also used to describe semi-synthetic and fully synthetic compounds. flavonoids tetrahydrochromenochromene