acrolein N-methyl-N-(pent-4-ynoyl)hydrazone

6-羟基-5H-吡咯并[3,4-b]吡啶-5,7(6H)-二酮

喹啉酸

2-(N-phenylcarbamoyl)pyridine-3-carboxylic acid

2-(甲氧基羰基)烟酸