6-methoxy-2-pyrazinecarboxylic acid 4-oxide

4-氧代-6-氧代-1H-吡嗪-4-鎓-2-羧酸

1,6-二氢-N-甲基-6-氧代-吡嗪甲酰胺 4-氧化物

1,6-dihydro-6-oxo-2-pyrazinecarboxylic acid 4-oxide diisopropylamine salt

6-mercapto-2-pyrazinecarboxylic acid 4-oxide