You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 3-bromo-5-(2-fluorophenyl)-N-[(1-hydroxypyridin-1-ium-3-yl)methyl]pyrazolo[1,5-a]pyrimidin-7-amine;3-bromo-5-(furan-2-yl)-N-[(1-oxidopyridin-1-ium-3-yl)methyl]pyrazolo[1,5-a]pyrimidin-7-amine;5-cyclohexyl-3-ethyl-N-[(1-hydroxypyridin-1-ium-3-yl)methyl]pyrazolo[1,5-a]pyrimidin-7-amine;3-ethyl-N-[(1-hydroxypyridin-1-ium-3-yl)methyl]-5-phenylpyrazolo[1,5-a]pyrimidin-7-amine is given. What is its corresponding molecular formula?
user
C74H72Br2FN20O5+3
assistant