InChI=1S/C22H20O13/c23-12-8-10(19(27)28)4-5-13(12)34-14(20(29)30)7-9-2-1-3-11(6-9)33-22-17(26)15(24)16(25)18(35-22)21(31)32/h1-8,15-18,22-26H,(H,27,28)(H,29,30)(H,31,32)/b14-7-