InChI=1S/C28H34O3/c1-27-15-13-19(26(30)31-3)17-20(27)9-10-21-22-11-12-24(28(22,2)16-14-23(21)27)25(29)18-7-5-4-6-8-18/h4-9,17,21-24H,10-16H2,1-3H3/t21?,22?,23?,24-,27+,28+/m1/s1