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