1H-Imidazolium, 1-[2-oxo-2-[[2-[[3-[1,2,3,4-tetrahydro-2,4-dioxo-1-[(2R,5S)-tetrahydro-5-(3,5,7,7-tetrahydroxy-3,5,7-trioxido-2,4,6-trioxa-3,5,7-triphosphahept-1-yl)-2-furanyl]-5-pyrimidinyl]-2-propyn-1-yl]oxy]ethyl]amino]ethyl]-3-[[(2,2,2-trifluoroacetyl)amino]ethyl]-, inner salt