You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-3-(2-cyanothiophen-3-yl)-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C13H16N2O4S
assistant