You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-methyl-N-(1-methylsulfanylbutan-2-yl)-2-oxo-3,4-dihydro-1H-quinoline-6-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H22N2O2S
assistant