You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(5-bromo-2-methoxyphenyl)-5-propyl-1,4,6,7-tetrahydropyrazolo[4,3-c]pyridine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H20BrN3O
assistant