You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 1-[(3-fluoro-4-methoxyphenyl)methyl]-4-[(2,3,4-trimethoxyphenyl)methyl]piperazine-1,4-diium using the IUPAC nomenclature.
user
C22H31FN2O4+2
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