You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[1-(2-methoxyphenyl)pyrrolidin-3-yl]-2-methyl-3-[(2-phenyloxan-3-yl)methyl]guanidine is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H34N4O2
assistant