You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(4-cyano-1,3-thiazol-2-yl)oxy]-N-[(2S,3R)-2-methyl-1-azabicyclo[2.2.2]octan-3-yl]benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H20N4O2S
assistant