You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 3-[(3-carbamoyl-1,2,4-oxadiazol-5-yl)methyl]azetidine-1-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C12H18N4O4
assistant