You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl (6R)-6-(cyclohexylcarbamoyl)-5-(2,5-dimethylphenyl)-6-methyl-4-oxo-7H-pyrazolo[1,5-a]pyrazine-2-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H32N4O4
assistant