You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-(5-fluoro-1H-indol-3-yl)ethyl]-2-methyl-3-[(2-phenyl-1,3-oxazol-4-yl)methyl]guanidine is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H22FN5O
assistant