You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named N-[(1S,3R)-3-(2-fluoro-2-phenylethoxy)cyclopentyl]-1H-pyrazolo[3,4-d]pyrimidin-4-amine is given. What is its corresponding molecular formula?
user
C18H20FN5O
assistant