You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [(2S,3R,4S,5S)-5-[2-amino-6-oxo-7-[(4-phenylphenyl)methyl]-1H-purin-9-ium-9-yl]-3,4-dihydroxyoxolan-2-yl]methyl dihydrogen phosphate .
user
C23H25N5O8P+
assistant