4a(2H)-Picenecarboxylic acid, 1,3,4,5,6b,7,8,8a,9,10,11,12,12a,12b,13,14,14a,14b-octadecahydro-10-[[(2E)-3-(4-hydroxyphenyl)-1-oxo-2-propenyl]oxy]-2,2,6b,9,9,12a,14a-heptamethyl-, (4aS,6bR,10S,12aR,14aS)- AIDS-059439 AIDS059439 Triterpene ester