You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-[(S)-azepan-1-ium-1-yl-[1-(2-methoxyethyl)tetrazol-5-yl]methyl]-6-methoxy-1H-quinolin-2-one into its molecular formula.
user
C21H29N6O3+
assistant