You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2-methylphenyl)-4-(4,5,6,7-tetrahydropyrazolo[1,5-a]pyridine-3-carbonyl)piperazine-1-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H25N5O2
assistant