InChI=1S/C6H7O7.2Fe.Na.H4O7P2/c7-3(8)1-6(13,5(11)12)2-4(9)10;;;;1-8(2,3)7-9(4,5)6/h1-2H2,(H,7,8)(H,9,10)(H,11,12);;;;(H2,1,2,3)(H2,4,5,6)/q-1;2*+3;+1;/p-6