InChI=1S/C17H19NO9/c19-11(20)4-2-8-5-7-1-3-9(6-10(7)18-8)26-17-14(23)12(21)13(22)15(27-17)16(24)25/h1,3,5-6,12-15,17-18,21-23H,2,4H2,(H,19,20)(H,24,25)