“…Several observations indicate that s-triazine analogues are the widely studied heterocyclic compounds owing to their broad spectrum of biological activity, including antimicrobial [7][8][9][10] , antimycobacterial 11 , anticancer 12,13 , antimalarial 14 and anti-HIV (NNRTIs) properties 15 . The biological importance of quinazoline had already stimulated the medicinal chemists to consider it as a building block due to its broad range of pharmacological properties, such as antimicrobial [16][17][18] , anti-HIV and anti-TMV (Tobacco Mosaic Virus) 19,20 , antitubercular 21 , anticancer 22 , anti-inflammatory 23 , anticonvulsant 24 , antidepressant 25 , hypolipidemic 26 , antiulcer 27 , analgesic 28 and immunotropic activities 29 . Moreover, piperazine heterocycles are valuable structural units in drug research [30][31][32][33][34][35][36] .…”