You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 4-bromo-2-[6-(3-bromophenyl)-2-(4-chlorophenyl)-1,2,3,4-tetrahydropyrimidin-3-ium-4-yl]phenol .
user
C22H18Br2ClN2O+
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