InChI=1S/C19H32O9/c1-10(21)5-6-19(26)17(2,3)7-11(8-18(19,4)25)27-16-15(24)14(23)13(22)12(9-20)28-16/h5-6,11-16,20,22-26H,7-9H2,1-4H3/b6-5+