InChI=1S/C21H32O8/c1-10(9-22)5-4-6-19(2)11-7-12-20(19,3)21(12,8-11)29-18-15(25)13(23)14(24)16(28-18)17(26)27/h5,11-16,18,22-25H,4,6-9H2,1-3H3,(H,26,27)/b10-5-