You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 1-[2-(2,5-dimethylphenyl)pyrazolo[1,5-a]pyrazin-4-yl]-N-phenylpiperidine-4-carboxamide ?
user
C26H27N5O
assistant