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-ethyl-2-(2-hydroxy-3-thiophen-2-ylsulfonylpropyl)-3-(1-propan-2-ylpiperidin-4-yl)guanidine;hydroiodide ?
user
C18H33IN4O3S2
assistant