(1S,2R,4aS,6aS,6bR,8aR,10S,12aR,12bR,14bS)-10-(3,3-Dimethyl-butanoyloxy)-1,2,6a,6b,9,9,12a-heptamethyl-1,3,4,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-octadecahydro-2H-picene-4a-carboxylic acid 3-O-tert-Butylacetyl-ursolic acid AIDS-104962 AIDS104962