You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[7-(1-hydroxyethyl)-4-oxo-2-propan-2-ylpyrazolo[1,5-d][1,2,4]triazin-5-yl]acetic acid into molecular formula.
user
C12H16N4O4
assistant