You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
propan-2-yl 3-[[(4R)-2-[2-[(1R)-1-(2-amino-6-chloropurin-9-yl)-2-hydroxy-2-methylpropoxy]ethoxy]-5,5-dimethyl-2-oxo-1,3,2lambda5-dioxaphosphinane-4-carbonyl]amino]propanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H36ClN6O9P
assistant