Studies on Quinazoline and Mercaptoquinazollne. Preparation and Antibacterial Activity of 2-(2'-Styryl-4'-oxoquinazolino-6'-ylamlno )-4-(arylureido)-6-chloro-s-triazine and 2-(2'- Mercapto-3'-(4'' -methylphenyl)-4'-oxoquinazolino-6' -Ylamino-4 ,6-bis- (arylureido )-s-triazine - K. R. DESAI (1988)