You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(5R,6R,9S,13S)-7-acetyl-1,7-diazatricyclo[7.3.1.05,13]tridecan-6-yl]butanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H28N2O3
assistant