InChI=1S/C21H22O10/c22-13-6-3-10-7-11(8-29-18(10)14(13)23)9-1-4-12(5-2-9)30-21-17(26)15(24)16(25)19(31-21)20(27)28/h1-6,11,15-17,19,21-26H,7-8H2,(H,27,28)