You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[4-[2-(diethylamino)ethoxy]phenyl]methyl]-1-ethyl-3-(3-hydroxy-2-phenylpropyl)guanidine is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H38N4O2
assistant