You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (2S)-2-[(3R,5S)-3,5-dimethylpiperidin-1-ium-1-yl]-N-[3-(dimethylsulfamoyl)phenyl]propanamide ?
user
C18H30N3O3S+
assistant