You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 1-cyclopentyl-3-ethyl-2-[3-(4,5,6,7-tetrahydro-1,3-benzothiazol-2-yl)propyl]guanidine;hydroiodide ?
user
C18H31IN4S
assistant