You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule ethyl N-[4-[[4-hydroxy-5-methyl-2-oxo-3-[4-(trifluoromethoxy)phenyl]imidazol-1-yl]methyl]pyridin-2-yl]carbamate ?
user
C20H19F3N4O5
assistant