You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2,8-dichloro-1-(2-methylpropyl)-3,7,9-trioxa-1-aza-2,8-diphosphaspiro[4.5]decane The above is the IUPAC name of a molecule. Write its molecular formula.
user
C8H15Cl2NO3P2
assistant