Lal, K.B. “Reactivity of Amino and Methyl Groups in 3-Amino-2-Methyl-3,4-Dihydro-4-Oxo-Quinzoline towards Condensation With Aldehydes”. Asian Journal of Chemistry, vol. 10, no. 1, Mar. 2010, pp. 35-38, https://asianpubs.org/index.php/ajchem/article/view/23545.