You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 4-[2-(2-butyl-2,3-dihydrofuran-3-id-5-yl)ethyl]-2-[2-hydroxy-2-(4-propan-2-ylpyrrol-2-ylium-2-yl)ethoxy]phenol .
user
C25H33NO4
assistant