InChI=1S/C16H20N2O14/c19-5-1-3(13(25)26)18(16(29)17-5)12-9(23)6(20)4(31-12)2-30-15-10(24)7(21)8(22)11(32-15)14(27)28/h1,4,6-12,15,20-24H,2H2,(H,25,26)(H,27,28)(H,17,19,29)