InChI=1S/C21H30O9/c1-10-4-3-5-12(6-7-13-11(2)19(25)28-14(13)8-10)20(26)30-18-16(23)15(9-22)29-21(27)17(18)24/h5,8,11,13-18,21-24,27H,3-4,6-7,9H2,1-2H3/b10-8+,12-5+/t11?,13-,14+,15+,16+,17+,18-,21+/m0/s1