InChI=1S/C25H34O6/c1-8-14(3)21(26)30-18-11-10-16(5)24(7)13-25(17(6)12-29-23(25)28)20(19(18)24)31-22(27)15(4)9-2/h8-9,16,18-20H,6,10-13H2,1-5,7H3/b14-8+,15-9+