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 (5R)-5-[(2S)-3-[4-(3,4-difluoro-5-methoxyphenyl)piperazin-1-yl]-2-methyl-3-oxopropyl]-2-hydroxy-5-methylimidazolidin-4-one ?
user
C19H26F2N4O4
assistant