2-[(4-oxo-3H-pyrido[3,4-d]pyridazin-1-yl)amino]ethyl acetate

2-[(1-oxo-2H-pyrido[3,4-d]pyridazin-4-yl)amino]ethyl acetate

5-oxidofuro[3,4-c]pyridin-5-ium-1,3-dione

5-hydroxy-2H-benzo[g]isoquinoline-6,9,10-trione

呋喃并[3,4-c]吡啶-1(3h)-酮