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