InChI=1S/C15H24O9/c1-7(13(19)20)5-3-4-6-8(2)23-15-11(18)9(16)10(17)12(24-15)14(21)22/h5,8-12,15-18H,3-4,6H2,1-2H3,(H,19,20)(H,21,22)/b7-5-