You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[5-(3-aminoazetidin-1-yl)sulfonyl-1-oxoisoquinolin-2-yl]methyl N,N-dimethylcarbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H20N4O5S
assistant