You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4-(naphthalen-1-ylmethyl)piperazin-4-ium-1-yl]-4-thiophen-2-ylbutane-1,4-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H25N2O2S+
assistant