InChI=1/C10H17N2O4P/c1-4-14-17(13,15-5-2)9(6-11)10-12-7-8(3)16-10/h8,12H,4-5,7H2,1-3H3/b10-9 diethyl [(Z)-cyano(5-methyl-1,3-oxazolidin-2-ylidene)methyl]phosphonate phosphonic acid, [(Z)-cyano(5-methyl-2-oxazolidinylidene)methyl]-, diethyl ester