InChI=1S/C20H18O10/c21-9-3-1-8(2-4-9)13-5-10(22)15-11(23)6-14(17(26)19(15)29-13)30-20-18(27)16(25)12(24)7-28-20/h1-6,12,16,18,20-21,23-27H,7H2/t12-,16+,18+,20-/m0/s1