You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[9-[(2R,4S,5R)-5-[[bis(4-methoxyphenyl)-phenylmethoxy]methyl]-4-[[di(propan-2-yl)amino]-[2-(4-nitrophenyl)ethoxy]phosphanyl]oxyoxolan-2-yl]-6-[2-(4-nitrophenyl)ethoxy]purin-2-yl]-2-methylpropanamide into molecular formula.
user
C57H65N8O12P
assistant