You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(2-tert-butyl-1,3-thiazol-4-yl)methyl]-1-ethyl-3-[[3-(2-hydroxyethyl)oxolan-3-yl]methyl]guanidine;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H33IN4O2S
assistant