You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-butan-2-yl-5-[[1-methyl-4-(4-methylpiperazin-1-yl)-2-oxoquinolin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H28N4O2S2
assistant