Four new quinazolinone derivatives of 6,8-dibromo-2-methyl-3-[3-mercapto-4-
(4-phenyl/substituted phenyl)-4(H)-1,2,4-triazol-5-yl-methyl amino]-quinazo
lin-4(3H) ones were synthesized and characterized by their spectral and ana
lytical data: All compounds could inhibit the oxytocin-induced rat uterus c
ontractions, however, with a degree of variation. Particularly, compounds V
a and Vb produced significant relaxation on rat uterus muscle.