1,2,3-Benzotriazin-4(3H)-one is an 1,2,3-benzotriazine derivative.[1] 1,2,3-Benzotriazin-4(3H)-one undergoes thermal condensation with α-amino acids to yield 3H-1,4-benzodiazepin-(1H,4H)-2,5-diones. 1,2,3-benzotriazin-4(3H)-one on thermolysis yields quinazolino[3,2-c][1,2,3]benzotriazin-8-one.
B 2128 (OTTO) 1,2,3-Benzotriazin-4(3H)-one, 98% Cas 90-16-4 - used in chemical research.