You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (2R,3S,4R,5R)-2-(6-amino-2-cyclopentyloxypurin-9-yl)-4-fluoro-5-(fluoromethyl)oxolan-3-ol ?
user
C15H19F2N5O3
assistant