You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[1-(cyclopentanecarbonyl)pyrrolidin-3-yl]-2-[[4-(2,5-dihydropyrrol-1-yl)phenyl]methyl]-3-ethylguanidine is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H35N5O
assistant