InChI=1S/C21H16O13/c1-5(22)31-10-4-30-21(16(27)14(10)25)32-9-3-7-12-11-6(19(28)34-18(12)15(9)26)2-8(23)13(24)17(11)33-20(7)29/h2-3,10,14,16,21,23-27H,4H2,1H3/t10-,14+,16+,21-/m0/s1