You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[3,5-bis(1,1,1-trifluoro-2-hydroxypropan-2-yl)cyclohexyl]-1,1,1-trifluoropropan-2-yl] 2,2-dimethylbutanoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H31F9O4
assistant