InChI=1S/C6H8O7.2C2H5NO2.Zn/c7-3(8)1-6(13,5(11)12)2-4(9)10;2*3-1-2(4)5;/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12);2*1,3H2,(H,4,5);/q;;;+2/p-2