You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named ethyl (3S)-1-[2-[5-chloro-2-(1,2,4-triazol-1-yl)anilino]-2-oxoethyl]piperidine-3-carboxylate is given. What is its corresponding molecular formula?
user
C18H22ClN5O3
assistant