You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1,4-dimethyl-6-(3-methylpiperidin-1-yl)-5-[(Z)-[3-(2-methylpropyl)-4-oxo-2-sulfanylidene-1,3-thiazolidin-5-ylidene]methyl]-2-oxopyridine-3-carbonitrile is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H28N4O2S2
assistant