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