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-[[2-(4-methoxyphenyl)-1,3-thiazol-4-yl]methyl]-2-methyl-3-(2-methyl-2-thiophen-2-ylpropyl)guanidine;hydroiodide ?
user
C21H27IN4OS2
assistant