InChI=1S/C21H18O15/c22-4-1-7-9(8(2-4)35-21-17(31)14(28)16(30)19(36-21)20(32)33)12(26)15(29)18(34-7)5-3-6(23)11(25)13(27)10(5)24/h1-3,14,16-17,19,21-25,27-31H,(H,32,33)