InChI=1S/C21H32O10/c1-8-3-4-11-18(31-20(27)21(11,28)7-23)14-9(2)12(5-10(8)14)29-19-17(26)16(25)15(24)13(6-22)30-19/h9-19,22-26,28H,1,3-7H2,2H3