You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-(4-amino-1,2,5-oxadiazole-3-carbonyl)-N-(4-ethylphenyl)-1,4-diazepane-1-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H22N6O3
assistant