dehydroergosterol

Noun

 * 1)  The fluorescent cholesterol analogue (3S,10S,13R,14R,17R)-17-[(E,2R,5R)-5,6-dimethylhept-3-en-2-yl]-10,13-dimethyl-2,3,4,12,14,15,16,17-octahydro-1H-cyclopenta[a]phenanthren-3-ol