You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(2-hydroxyethyl)-3-oxo-N-[(3-pyridin-3-yl-1,2,4-oxadiazol-5-yl)methyl]piperazine-1-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H18N6O4
assistant