InChI=1S/C21H20O15/c22-6-4-10(26)14(29)18(35-21-17(32)15(30)16(31)19(36-21)20(33)34)11(6)13(28)9(25)3-5-1-7(23)12(27)8(24)2-5/h1-2,4,15-17,19,21-24,26-27,29-32H,3H2,(H,33,34)