InChI=1S/C23H20O13/c1-33-20-15(27)14-12(34-19(20)8-2-3-9(7-24)11(26)4-8)5-10(25)6-13(14)35-23-18(30)16(28)17(29)21(36-23)22(31)32/h2-7,16-18,21,23,25-26,28-30H,1H3,(H,31,32)