You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl (3S)-3-[[(2S)-1-methylsulfanylpropan-2-yl]amino]pyrrolidine-1-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C13H26N2O2S
assistant