5-(o-aminobenzyl)-6-azauracil

2,3,4,10-tetrahydro-1,2,4-triazino[5,6-b]quinolin-3-one

1-acetylamino-1,2-dihydroimidazo<4,5-b>quinolin-2-one

邻硝基苯基丙酮酸

2-thio-5-(o-nitrobenzyl)-6-azauracil