InChI=1S/C5H12N2O2.C5H6O5/c6-3-1-2-4(7)5(8)9;6-3(5(9)10)1-2-4(7)8/h4H,1-3,6-7H2,(H,8,9);1-2H2,(H,7,8)(H,9,10)/t4-;/m0./s1