You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named ethynyl 4-[2-[(4-chlorophenyl)methylcarbamoyl]-5-(methylaminomethyl)pyridin-4-yl]oxypiperidine-1-carboxylate is given. What is its corresponding molecular formula?
user
C23H25ClN4O4
assistant