久久久久久人妻一区二区三区-精品久久久久久久无码-欧美日韩中文国产-久久伊人精品综合观看99-国产秒拍99福利精品小视频

Product name: 3-Aminopyrazine-2-carboxylic acid
CAS No.: 5424-01-1
Molecular formula: C₅H₄N₃O₂
Molecular weight: 138.1047
Structural formula: