The researchers studied the mass spectra of 8, 8-dicyanoheptafulvene and its derivatives, which are unique aromatic compounds. They used mass spectrometry to show the high aromaticity of these compounds. The mass spectra revealed that dicyanoheptafulvenes can lose hydrogen cyanide and rearrange into phenylpropiolonitrile ions. Methoxy dicyanoheptafulvenes had different fragmentation patterns compared to 8, 8-dicyanoheptafulvenes. The study discussed the structures and fragmentation processes of these compounds.