3-氟-5-甲基吡啶英文名称:3-Fluoro-5-methylpyridineCAS号:407-21-6分子式:C6H6FN分子量:111.123,5-二氟-2-吡啶羧酸英文名称:3,5-Difluoropicolinic acidCAS号:745784-04-7分子式:C6H3F2NO2分子量:159.09