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