(5xi,9xi)-3-oxooleana-11,13(18)-dien-28-oic acid 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-hexadecahydro-2H-picene-4a-carboxylic acid 3-Oxo-11,13(18)-oleanadien-28-oic acid InChI=1/C30H44O3/c1-25(2)14-16-30(24(32)33)17-15-28(6)19(20(30)18-25)8-9-22-27(5)12-11-23(31)26(3,4)21(27)10-13-29(22,28)7/h8-9,21-22H,10-18H2,1-7H3,(H,32,33)/t21?,22?,27-,28+,29+,30-/m0/s oleana-11,13(18)-dien-28-oic acid, 3-oxo-, (5xi,9xi)-