Crystal, Molecular Structure and DFT Study of 2,6,7-Trimethyl-3-p-tolylquinoxaline and 2-(4-Methoxyphenyl)-3,6,7-trimethylquinoxaline?, Ibrahim, M. M.; Ali, B. F.; El-Barghouthi, M. I.; Zaghal, M. H; Frey, W. J. Chem. Crystallogr. 2015, 45(7), pp. 319-329.
