2-amino-3,6-dimethoxybenzaldehyde

2,5,8-trioxo-(1H)quinoline-3-carbonitrile

3-nitro-(1H)quinoline-2,5,8-trione

5,8-dimethoxy-2-oxo-(1H)-quinoline-3-carbonitrile

5,8-dimethoxy-3-nitro-(1H)-quinolin-2-one