InChI=1S/C21H34O8/c1-10-5-4-7-21(3)8-6-12(11(2)9-22)17(13(10)21)28-20-16(25)14(23)15(24)18(29-20)19(26)27/h11-18,20,22-25H,1,4-9H2,2-3H3,(H,26,27)