InChI=1S/C17H20N2O9/c18-9(15(23)24)3-6-5-19-10-2-1-7(4-8(6)10)27-17-13(22)11(20)12(21)14(28-17)16(25)26/h1-2,4-5,9,11-14,17,19-22H,3,18H2,(H,23,24)(H,25,26)