You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-chloro-4-[3-[1-(1-ethoxyethyl)pyrazol-3-yl]-2-methoxyanilino]-N-(trideuteriomethyl)pyridine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H24ClN5O3
assistant