2-benzyl-4H-1,4-benzoxazin-3-one

2-(thiophen-2-ylmethylidene)-4H-1,4-benzoxazin-3-one

6-羟基-2H-1,4-苯并嗪-3(4H)-酮

2-benzylidene-4H-1,4-benzoxazin-3-one