You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-ethyl-3-[2-hydroxy-2-(1-methylpyrazol-4-yl)propyl]-2-[(3-methoxy-4-propoxyphenyl)methyl]guanidine .
user
C21H33N5O3
assistant