You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
carbanide;2-methanidylpropane;2-(3-methyl-1,2-oxazol-5-yl)-N-(5-methyl-1H-pyrazol-3-yl)acetamide;niobium(2+) The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H24N4NbO2
assistant