InChI=1S/C25H32O8/c1-7-20-24(4)23(30-16(3)26)25(5,33-20)22(28)18(32-24)13-11-9-8-10-12-17-15(2)19(29-6)14-21(27)31-17/h8-14,18,20,22-23,28H,7H2,1-6H3/b9-8+,12-10+,13-11+/t18-,20+,22-,23+,24-,25-/m0/s1