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