You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(5Z)-5-[[2-[3-(1H-imidazol-3-ium-3-yl)propylamino]-7-methyl-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-4-oxo-2-sulfanylidene-1,3-thiazolidin-3-yl]butanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H25N6O4S2+
assistant