You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[2-[[(2R,3R)-3-amino-4-[4-(trifluoromethyl)phenyl]butan-2-yl]amino]-1,3-thiazol-5-yl]-1,3-dihydroindol-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H21F3N4OS
assistant