You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [5-(1,3-benzodioxol-5-yl)-3-(2-ethoxyethoxy)-1,2,4-triazol-1-yl]-(4-bromophenyl)methanone by IUPAC nomenclature, provide its molecular formula.
user
C20H18BrN3O5
assistant