9-甲基-9H-嘌呤

7-[3-(2-methoxy-2-oxoacetyl)-2,4,5-trioxocyclopentyl]heptanoic acid

4-氧代-4H-苯并吡喃-2-羧酸甲酯

1,4-dihydrobenzo[g]quinoxaline-2,3-dione

N,N'-bis(3-aminopropyl)oxamide