2-吡啶甲酸

2-Oxo-3-(1-pyridinium)-1,2-dihydrochinolin-4-olat

3-苯基-2,4(1H,3H)-喹唑啉二酮

3-氨基-1H-喹唑烷-2,4-二酮

methyl 2-amino-5-phenylbenzoate