InChI=1S/C9H20O6P2.2Na/c10-16(11,12)9(17(13,14)15)7-8-5-3-1-2-4-6-8;;/h8-9H,1-7H2,(H2,10,11,12)(H2,13,14,15);;/q;2*+1/p-2