You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3S)-1-(4-methoxyphenyl)-N-(3-morpholin-4-ium-4-ylpropyl)-5-oxopyrrolidine-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H28N3O4+
assistant