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