InChI=1S/C21H30O9/c1-10-7-15-13(11(2)20(27)28-15)5-3-12(8-22)4-6-14(10)29-21-19(26)18(25)17(24)16(9-23)30-21/h4,7-8,11,13-19,21,23-26H,3,5-6,9H2,1-2H3/b10-7+,12-4+/t11-,13-,14-,15+,16+,17+,18-,19+,21+/m0/s1