You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4-[3-[4-(2,5-dichlorophenyl)piperazin-1-ium-1-yl]-2-hydroxypropoxy]-3-methoxyphenyl]ethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H27Cl2N2O4+
assistant