You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(1S)-2-(3-chloro-4-methoxyanilino)-2-oxo-1-phenylethyl]-[(1R)-1-phenylethyl]azanium The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H24ClN2O2+
assistant