InChI=1S/C17H19NO9/c19-11-12(20)14(15(22)23)26-17(13(11)21)27-16(24)10-4-3-9(25-10)6-8-2-1-5-18-7-8/h3-4,6-7,11-14,17,19-21H,1-2,5H2,(H,22,23)/b8-6-