4-((3R,5R,6S,10R,13R,17R)-3,6-Dihydroxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-17-yl)-pentanoic acid, {3-[4-(3-amino-propylamino)-butylamino]-propyl}-amide AIDS-108042 AIDS108042 SM-28