InChI=1S/C21H20O12/c22-9-3-1-8(12(25)5-9)2-4-11(24)15-13(26)6-10(23)7-14(15)32-21-18(29)16(27)17(28)19(33-21)20(30)31/h1-7,16-19,21-23,25-29H,(H,30,31)