5-nitro-2-(4-nitrophenyl)-1-benzofuran

5-氨基-2-(4-苯胺基)苯并呋喃

4-nitro-6-[(2-phenylethylamino)methylidene]cyclohexa-2,4-dien-1-one

N-(6-nitro-2-oxochromen-3-yl)acetamide

3-氨基-N-羟基-2-氧代苯并吡喃-6-胺氧化物