You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2,2,2-trifluoro-N-[4-[3-(4-hydroxy-3-propylhex-1-ynyl)phenyl]butyl]acetamide by IUPAC nomenclature, provide its molecular formula.
user
C21H28F3NO2
assistant