You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[[3-[(E)-4-[4-[(dimethylamino)methyl]pyridin-2-yl]oxybut-2-enyl]furan-2-yl]methylsulfonyl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H25N3O5S
assistant