InChI=1S/C21H32O9/c1-9-4-5-13(29-21-19(26)18(25)17(24)15(8-22)30-21)10(2)7-12(23)16-11(3)20(27)28-14(16)6-9/h4,7,11-19,21-26H,5-6,8H2,1-3H3/b9-4-,10-7+/t11-,12+,13-,14-,15+,16-,17+,18-,19+,21+/m0/s1