InChI=1S/C17H21NO9/c1-17(2)5-8(20)10-7(3-6(19)4-9(10)27-17)18-15-13(23)11(21)12(22)14(26-15)16(24)25/h3-4,11-15,18-19,21-23H,5H2,1-2H3,(H,24,25)