You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R,6S)-2,6-dimethyl-4-(4-prop-1-en-2-ylphenyl)piperazin-1-yl]-pyridin-4-ylmethanone;ethane The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H31N3O
assistant