InChI=1S/C25H26O4/c1-15(2)5-6-16-13-17(7-9-20(16)26)23-14-21(27)18-8-10-22-19(24(18)28-23)11-12-25(3,4)29-22/h5,7-13,23,26H,6,14H2,1-4H3