You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[dimethyl(trimethylsilylmethoxy)silyl]ethoxy-ethyl-[3-methoxypropyl-methyl-(trimethylsilylmethyl)silyl]oxy-methylsilane is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H52O4Si5
assistant