You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-(3,5-dichloropyridin-4-yl)-2-triethylsilyloxyethyl]spiro[2.5]octan-6-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H34Cl2N2OSi
assistant