(5xi,12alpha,15beta,20Z)-12,15-dihydroxy-3,7,11,23-tetraoxolanosta-8,20(22)-dien-26-oic acid 6-(12,15-Dihydroxy-4,4,10,13,14-pentamethyl-3,7,11-trioxo-2,3,4,5,6,7,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-2-methyl-4-oxo-hept-5-enoic acid Elfvingic acid A InChI=1/C30H40O8/c1-14(10-16(31)11-15(2)26(37)38)17-12-21(34)30(7)22-18(32)13-19-27(3,4)20(33)8-9-28(19,5)23(22)24(35)25(36)29(17,30)6/h10,15,17,19,21,25,34,36H,8-9,11-13H2,1-7H3,(H,37,38)/b14-10-/t15?,17-,19?,21-,25+,28+,29+,30+/m1/s lanosta-8,20(22)-dien-26-oic acid, 12,15-dihydroxy-3,7,11,23-tetraoxo-, (5xi,12alpha,15beta,20Z)-