You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-[2-(2-methylcyclohexyl)oxyacetyl]-3-oxo-2,5,6,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine-6-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H22N4O5
assistant