InChI=1S/C21H20O10/c22-6-8-4-10-15(18(27)14-9(16(10)25)2-1-3-11(14)24)12(5-8)30-21-20(29)19(28)17(26)13(7-23)31-21/h1-5,13,17,19-24,26,28-29H,6-7H2