You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
diethyl 2-(hydroxymethyl)-2-[4-[(2S)-2-pyridin-3-ylpiperidin-1-ium-1-yl]but-2-ynyl]propanedioate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H31N2O5+
assistant