InChI=1S/C23H20O12/c1-30-13-6-10-12(7-14(13)31-2)33-19-9-4-3-8(5-11(9)34-22(29)15(10)19)32-23-18(26)16(24)17(25)20(35-23)21(27)28/h3-7,16-18,20,23-26H,1-2H3,(H,27,28)