1. A. H. Amin, D. R. Mekta and S. S. Samarth, “Progress in Drug Research”, E. Jucker, Ed., Vol. 14, p. 218.
2. Synthesis and central nervous system activity of quinazolones related to 2-methyl-3-(o-tolyl)-4(3H)-quinazolone (methaqualone)
3. A Combination of Methaqualone and Diphenydramine is marketed as Mandrax (R) by Roussel Laboratories, Ltd.
4. See for instance the non-equivalence of the 2-methylene protons in 3 which can only arise because of restricted rotation around the N-(2-carbomethoxyphenyl) bond.
5. N. Cohen, personal communication.