You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[3-(2,3-dichlorophenoxy)-2-hydroxypropyl]-1-ethyl-3-[1-(2-methylpropyl)piperidin-4-yl]guanidine into its molecular formula.
user
C21H34Cl2N4O2
assistant