InChI=1S/C20H24O11/c21-12(10-8-6-4-2-1-3-5-7-9-11-13(22)23)19(29)31-20-16(26)14(24)15(25)17(30-20)18(27)28/h1-9,11-12,14-17,20-21,24-26H,10H2,(H,22,23)(H,27,28)/b3-1-,4-2+,7-5+,8-6+,11-9-