InChI=1S/C21H30O8/c1-10-4-6-13-12(3)20(26)27-15(13)8-11(2)14(7-5-10)28-21-19(25)18(24)17(23)16(9-22)29-21/h5,8,13-19,21-25H,3-4,6-7,9H2,1-2H3/b10-5+,11-8+/t13-,14+,15+,16+,17+,18-,19+,21+/m0/s1