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