You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2-chlorophenyl)-2-[4-(dimethylamino)pyridin-1-ium-1-yl]-3-hydroxy-3-thiophen-2-ylprop-2-enethioamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H19ClN3OS2+
assistant