Hexanedioic acid, bis(2-(((9-(5-O-(hydroxy(phosphonooxy)phosphinyl)-beta-D-ribofuranosyl)-9H-purin-6-yl)amino)acetyl)hydrazide), P'-5',P'''-5'''-diester with 3-(aminocarbonyl)-1-beta-D-ribofuranosylpyridinium hydroxide, bis(inner salt)