InChI=1S/C21H32O9/c1-10(2)13-8-14(22)12(6-4-5-11(3)7-15(13)23)9-29-21-18(26)16(24)17(25)19(30-21)20(27)28/h5,10,12-13,16-19,21,24-26H,4,6-9H2,1-3H3,(H,27,28)/b11-5-