You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 1-(4,5,6,7-tetrahydropyrazolo[1,5-a]pyridine-5-carbonyl)piperidine-4-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H23N3O3
assistant