You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[1-(2-chlorobenzoyl)-3-[(4-methyloxolan-3-yl)methyl]imidazolidin-2-ylidene]nitramide is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H19ClN4O4
assistant