2-(4-氟苯基)喹啉-4-羧酸

2,3-吲哚二酮 3-硫代缩氨基脲

1-乙基-1H-吲哚-2,3-二酮

2-ethoxy-3-(2,3-dihydro-2,3-dioxo-1H-indol-1-yl)-3-hydroxy-3H-indole