(4aS,6aS,6bR,12aR)-2,2,6a,6b,9,9,12a-Heptamethyl-10-oxo-1,3,4,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-octadecahydro-2H-picene-4a-carboxylic acid methyl ester 3-Oxo-olean-12-en-28-oic acid methyl ester AIDS-098118 AIDS098118