You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
sodium;7-[2-[4-(2-chlorophenyl)piperazin-1-yl]ethyl]-1,3-dimethylpurine-2,6-dione;hydrogen phosphate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H24ClN6NaO6P-
assistant