You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S,3S,5S)-2-[(2S)-2-amino-2-(1-ethenylcycloheptyl)acetyl]-2-azabicyclo[3.1.0]hexane-3-carbonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H25N3O
assistant