You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[2-[5-carboxy-3-ethenyl-2-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-3,4-dihydro-2H-pyran-4-yl]ethenyl]-1-ethylpyridin-1-ium-3-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H29NO11
assistant