You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[(3R)-oxan-3-yl]-N-[3-(2-sulfanylidene-1H-imidazol-3-yl)phenyl]propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H21N3O2S
assistant