You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-[[4-[(5-methyl-1,2-oxazol-3-yl)methyl]-1,4-diazepan-1-yl]sulfonyl]phenyl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H24N4O4S
assistant