You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 1-[2-(2,4-difluorophenyl)ethyl]-3-ethyl-2-(2-hydroxy-2-thiophen-2-ylpropyl)guanidine;hydroiodide ?
user
C18H24F2IN3OS
assistant