You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[[(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-oxidophosphoryl] [(2R,3S,4R,5S)-5-(3-carbamoylpyridin-1-ium-1-yl)-3,4-dihydroxyoxolan-2-yl]methyl phosphate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H26N7O14P2-
assistant