InChI=1S/C21H18O11/c22-9-5-12(23)14-13(6-9)30-7-11(15(14)24)8-1-3-10(4-2-8)31-21-18(27)16(25)17(26)19(32-21)20(28)29/h1-7,16-19,21-23,25-27H,(H,28,29)/t16-,17-,18+,19-,21+/m0/s1