(3S,8R,9R,10S,13R,14S)-17-((R)-1,5-Dimethyl-hex-4-enyl)-4,4,9,13,14-pentamethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-ol 10.alpha.-Cucurbita-5,24-dien-3 beta-ol 10.alpha.-Cucurbitadienol AIDS-075047 AIDS075047