You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-N-[(1S)-1-(5-fluoropyrimidin-2-yl)ethyl]-4-N-(1-methylimidazol-4-yl)-6,7-dihydro-5H-pyrrolo[3,4-d]pyrimidine-2,4-diamine into its molecular formula.
user
C16H18FN9
assistant