You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R)-3-amino-2-(3,3-difluorocyclobutyl)-3-[4-(3,3-dimethylbutyl)-3-methylphenyl]butan-1-ol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H33F2NO
assistant