bufenolide

Noun

 * 1)  A chemical compound related to bufanolide, but with an extra double bond with IUPAC name 5-[(8R,9S,10S,13S,14S,17S)-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]-3,4-dihydropyran-2-one.