InChI=1S/C21H32O9/c1-10-5-4-6-11(2)14(22)8-13(15(23)7-10)12(3)9-29-21-18(26)16(24)17(25)19(30-21)20(27)28/h5,11-13,16-19,21,24-26H,4,6-9H2,1-3H3,(H,27,28)/b10-5-