InChI=1S/C20H24O11/c21-13(22)10-8-6-4-2-1-3-5-7-9-12(11-14(23)24)30-20-17(27)15(25)16(26)18(31-20)19(28)29/h1-10,12,15-18,20,25-27H,11H2,(H,21,22)(H,23,24)(H,28,29)/b2-1-,5-3+,6-4+,9-7+,10-8-