3,4-Dihydro-1,2,3-benzotriazin-4-one3,4-dihydro-1,2,3-benzotriazin-4-one1,2,3-Benzotriazin-4(3H)-one1,2,3-Benzotriazin-4(3H)-one1,2,3-苯并三嗪-4(3H)-酮benzo[d][1,2,3]triazin-4(3H)-one3H-Benzo[d][1,2,3]triazin-4-one1,2,3-Benzotriazin-4(3H)one4-Ketobenzo-1,2,3(3H)-triazine1,2,3-苯并三嗪-4-酮