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