You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by [(1S)-1-[4-(dimethylamino)phenyl]-2-[[2-[(4-methoxyphenyl)methylamino]-2-oxoacetyl]amino]ethyl]-dimethylazanium ?
user
C22H31N4O3+
assistant