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