InChI=1/C12H22O9P2/c1-5-17-22(15,18-6-2)9-10(12(14)21-11(9)13)23(16,19-7-3)20-8-4/h9-10H,5-8H2,1-4H phosphonic acid, (tetrahydro-2,5-dioxo-3,4-furandiyl)bis-, tetraethyl ester tetraethyl (2,5-dioxotetrahydrofuran-3,4-diyl)bis(phosphonate)