InChI=1S/C28H42O4/c1-17(2)18(3)7-8-19(4)22-15-23(30)24-21-10-12-27-16-20(29)9-11-26(27,6)28(21,32-31-27)14-13-25(22,24)5/h7-8,10,12,17-20,22-23,29-30H,9,11,13-16H2,1-6H3/b8-7+/t18?,19-,20+,22-,23-,25-,26+,27-,28-/m1/s1