1H-Purinium, 2-amino-9-(5-O-(7-(4-benzoylphenyl)-1,3,5-trihydroxy-2,4-dioxa-6-aza-1,3,5-triphosphahept-1-yl)-beta-D-ribofuranosyl)-6,9-dihydro-7-methyl-6-oxo-, hydroxide, inner salt, P,P',P''-trioxide