You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(1S)-2-(3,5-dichloro-1-oxidopyridin-1-ium-4-yl)-1-(3,4-dimethoxyphenyl)ethyl] 5-[[(2-methylpropan-2-yl)oxycarbonylamino]methyl]thiophene-2-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H28Cl2N2O7S
assistant