InChI=1S/C28H44O2/c1-17(2)18(3)7-8-19(4)22-9-10-23-21-16-26(30)25-15-20(29)11-13-28(25,6)24(21)12-14-27(22,23)5/h15,17-19,21-24H,7-14,16H2,1-6H3/t18-,19-,21?,22?,23?,24?,27-,28-/m1/s1