You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-methyl-N-[4-[(5-methyl-1,2-oxazol-3-yl)sulfamoyl]phenyl]-3,5-dinitrobenzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H15N5O8S
assistant