You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-chloro-4-ethyl-2-methyl-6-[3-[4-[5-(trifluoromethyl)pyridin-2-yl]oxyphenyl]propyl]pyrimidine by IUPAC nomenclature, provide its molecular formula.
user
C22H21ClF3N3O
assistant