You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 3-(3-amino-5-oxo-1-propan-2-ylpyrrolidin-2-yl)-3-methylazetidine-1-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H29N3O3
assistant