InChI=1S/C18H28O9/c1-9(26-18-17(25)16(24)15(23)13(8-19)27-18)3-2-4-11-10(7-14(21)22)5-6-12(11)20/h2-3,9-11,13,15-19,23-25H,4-8H2,1H3,(H,21,22)/b3-2+