You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[1-(4,7-dimethylpyrazolo[5,1-c][1,2,4]triazine-3-carbonyl)piperidin-4-yl]-4,4-dimethyl-1,3-oxazolidin-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H24N6O3
assistant