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