You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl N-[(5-cyanothiophen-3-yl)methyl]-N-[(2-methylpropan-2-yl)oxycarbonyl]carbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H22N2O4S
assistant