You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(E)-2-(7-hexyl-2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)ethenyl]-2-(1H-imidazol-2-yl)pyridine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H25N3O2S
assistant