You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(4-bromophenyl)-5-(2,3-dihydro-1,4-benzodioxin-6-yl)pyrazole-3-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H13BrN2O4
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