InChI=1S/C21H18O10/c22-13-11-6-1-2-7-12(11)30-18(15(13)24)9-4-3-5-10(8-9)29-21-17(26)14(23)16(25)19(31-21)20(27)28/h1-8,14,16-17,19,21,23-26H,(H,27,28)