Crystal structure of diaqua(2-methylpyrazine-5-carboxylato)copper(II) dinitrate dihydrate, [CU(C6H6N2O2)2(H2O)2 ]·[NO3]2*2H2O - Liu1 Bin; Yang Bo-Lun (Zeitschrift für Kristallographie - New Crystal Structures, 2009)