You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[2,6-bis[(1E,3E)-4-(4-nitrophenyl)buta-1,3-dienyl]pyridin-1-ium-1-yl]ethanamine by IUPAC nomenclature, provide its molecular formula.
user
C27H25N4O4+
assistant