5-((3a-(((4-Carboxy-3,3-dimethylbutanoyl)amino)methyl)-1-isopropenyl-5a,5b,8,8,11a-pentamethylicosahydro-1H-cyclopenta[a]chrysen-9-yl)amino)-3,3-dimethyl-5-oxopentanoic acid AIDS-161619 AIDS161619 NSC705969