InChI=1S/C21H20O13/c22-4-11-17(29)19(31)20(32)21(34-11)13-6(24)3-9-12(18(13)30)5(23)2-10(33-9)14-15(27)7(25)1-8(26)16(14)28/h1-3,11,17,19-22,24-32H,4H2/t11-,17-,19+,20-,21+/m1/s1