You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-(cycloheptylamino)-2-oxoethyl] 2-[(5-amino-1,3,4-thiadiazol-2-yl)sulfanyl]acetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C13H20N4O3S2
assistant