3-(3-Hydroxy-3-isopropenyl-17-isopropyl-5,8,9,13-tetramethyl-hexadecahydro-cyclopenta[a]phenanthren-4-yl)-propionic acid 3-[(3alpha,4alpha,5alpha,10xi,14xi,17beta)-3-hydroxy-3-isopropenyl-17-isopropyl-5,8,9-trimethylestran-4-yl]propanoic acid Dorstenic acid A InChI=1/C30H50O3/c1-19(2)21-9-10-22-26(21,5)15-17-29(8)23-13-14-30(33,20(3)4)24(11-12-25(31)32)27(23,6)16-18-28(22,29)7/h19,21-24,33H,3,9-18H2,1-2,4-8H3,(H,31,32)/t21-,22?,23?,24+,26-,27-,28+,29-,30+/m1/s propanoic acid, 3-[(3alpha,4alpha,5alpha,10xi,14xi,17beta)-3-hydroxy-5,8,9-trimethyl-3-(1-methylethenyl)-17-(1-methylethyl)estran-4-yl]-