You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 4,4,4-trifluoro-3-hydroxy-3-(1-methylimidazol-2-yl)-N-[2-(4-pyrazol-1-ylphenyl)ethyl]butanamide ?
user
C19H20F3N5O2
assistant