InChI=1S/C21H28O10/c1-11(2)8-13(22)9-21(3,6-4-14(23)12-5-7-29-10-12)31-20-17(26)15(24)16(25)18(30-20)19(27)28/h5,7-8,10,15-18,20,24-26H,4,6,9H2,1-3H3,(H,27,28)