InChI=1S/C21H24O10/c1-29-12-6-11(15(23)8-10-4-2-3-5-14(10)22)7-13(9-12)30-21-18(26)16(24)17(25)19(31-21)20(27)28/h2-7,9,15-19,21-26H,8H2,1H3,(H,27,28)