InChI=1S/C20H22O11/c21-13(22)8-6-4-2-1-3-5-7-11-12(29-11)9-10-14(23)30-20-17(26)15(24)16(25)18(31-20)19(27)28/h1-12,15-18,20,24-26H,(H,21,22)(H,27,28)/b3-1-,4-2+,7-5+,8-6-,10-9-