You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-N-(4-chloro-3,5-dimethylphenyl)-5-fluoro-4-N-(2,2,3,3-tetrafluoro-1,4-benzodioxin-6-yl)pyrimidine-2,4-diamine .
user
C20H14ClF5N4O2
assistant