You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 4-[2-[(1S,5R)-6-cyano-3-azabicyclo[3.1.0]hexan-3-yl]-2-oxoethyl]piperazine-1-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H26N4O3
assistant