You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named phenyl 2-[4-[3-(trifluoromethyl)phenyl]piperazin-1-ium-1-yl]ethanesulfonate by IUPAC nomenclature, provide its molecular formula.
user
C19H22F3N2O3S+
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