InChI=1S/C21H20O15/c22-5-3-8(25)17(35-21-15(31)12(28)14(30)19(36-21)20(32)33)18-9(5)11(27)13(29)16(34-18)4-1-6(23)10(26)7(24)2-4/h1-3,12-16,19,21-26,28-31H,(H,32,33)