4-[2-[4-[(E)-2-[4-[(E)-2-[4-[2-(2,6-dipyridin-2-ylpyridin-4-yl)ethynyl]-2,5-bis[(2S)-2-methylbutoxy]phenyl]ethenyl]-2,5-bis[(2S)-2-methylbutoxy]phenyl]ethenyl]-2,5-bis[(2S)-2-methylbutoxy]phenyl]ethynyl]-2,6-dipyridin-2-ylpyridine is the IUPAC name of a molecule. Please give its molecular formula.