You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethane;molecular hydrogen;N-[(1S)-2-oxo-1-phenyl-2-(2-propan-2-ylpyrrolidin-1-yl)ethyl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H32N2O2
assistant