3-methyl-4-oxidoquinoxalin-4-ium-2-carboxylic acid

3-methylquinoxaline-2-carbohydrazide

3H-pyridazino[4,5-b]quinoxalin-4-one

2-(甲氧羰基)-3-甲基喹喔啉二鎓-1,4-二醇