You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named ethyl 1-[(Z)-3-(butan-2-ylamino)-2-cyano-3-oxoprop-1-enyl]piperidine-4-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C16H25N3O3
assistant