Molecular species identified in the microwave spectrum obtained with an electric discharge of naphthalene recorded in the 2–12 GHz frequency range. The blue text indicates the products found in the microwave spectroscopic study of the discharge products coming from benzene (McCarthy et al. 2020) and the red box indicates species found in the IR-UV spectroscopic study of the discharge products coming from naphthalene (Lemmens et al. 2020).