InChI=1S/C19H30O9/c1-26-15(22)9-11-6-7-13(21)12(11)5-3-2-4-8-27-19-18(25)17(24)16(23)14(10-20)28-19/h2-3,11-12,14,16-20,23-25H,4-10H2,1H3/b3-2+