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