Cucurbitacins
Synonyms
19-Norlanosta-1,5-diene-3,11,22-trione, 16,24-epoxy-2,25-dihydroxy-9-methyl-, (9beta,10alpha,16alpha,24S)-
Triterpenes that derive from LANOSTEROL by a shift of the C19 methyl to the C9 position. They are found in seeds and roots of CUCURBITACEAE and other plants and are noted for intense bitterness.