InChI=1S/C22H18O10/c23-11-6-18-12(8-17(28)21(31-18)9-1-2-13(24)14(25)3-9)19(7-11)32-22(30)10-4-15(26)20(29)16(27)5-10/h1-7,17,21,23-29H,8H2/t17-,21+/m0/s1