You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(4-amino-3,4-dioxo-1-phenylbutan-2-yl)-3-chloro-4-pyridin-2-yl-1,2-oxazole-5-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H15ClN4O4
assistant