(3S,5S,8R,9R,10R,13R,14R,17R)-10,13,14-Trimethyl-17-[(1R,2E,4R)-1,4,5-trimethyl-2-hexenyl]-1,3,4,9,10,11,12,13,14,15,16,17-dodecahydro-2H-5,8-epidioxycyclopenta[a]phenanthren-3-yl acetate AIDS-114271 AIDS114271 Ergosterol-5,8-endoperoxide acetate