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