InChI=1S/C25H28O4/c1-15(2)5-7-19-21(26)9-8-18(23(19)27)17-13-16-6-10-22-20(24(16)28-14-17)11-12-25(3,4)29-22/h5-6,8-12,17,26-27H,7,13-14H2,1-4H3/t17-/m0/s1