You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule methyl (1S,2R)-2-[(2-sulfanylidene-3H-1,3-benzoxazole-6-carbonyl)amino]cycloheptane-1-carboxylate into molecular formula.
user
C17H20N2O4S
assistant