You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-methyl-5-[(E)-2-(5-piperidin-1-ylsulfonylthiophen-2-yl)ethenyl]-1,2-oxazol-4-yl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H21N3O4S2
assistant