You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 5-bromo-3-[[2-[4-(2-methoxyphenyl)piperazin-1-ium-1-yl]acetyl]amino]-1H-indole-2-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H26BrN4O4+
assistant