InChI=1S/C25H26O4/c1-2-3-4-5-8-17-28-24(26)20-13-9-14-21(18-20)25(27)29-23-16-10-12-19-11-6-7-15-22(19)23/h6-7,9-16,18H,2-5,8,17H2,1H3