InChI=1S/C17H21NO9/c19-7-10-2-1-9(25-10)5-8-6-18-4-3-11(8)26-17-14(22)12(20)13(21)15(27-17)16(23)24/h1-2,5-6,11-15,17,19-22H,3-4,7H2,(H,23,24)/b8-5+