InChI=1S/C21H34O9/c1-11(2)9-13(22)10-12(3)21(7-5-20(4,28)6-8-21)30-19-16(25)14(23)15(24)17(29-19)18(26)27/h5,7,11-12,14-17,19,23-25,28H,6,8-10H2,1-4H3,(H,26,27)