InChI=1S/C22H20O10/c23-7-17-19(25)20(26)21(27)22(32-17)31-11-2-3-12-15(6-11)28-8-13(18(12)24)10-1-4-14-16(5-10)30-9-29-14/h1-6,8,17,19-23,25-27H,7,9H2/t17-,19-,20+,21-,22-/m1/s1