abstract |
The present invention relates to the xinafoate salt of N4-[(2, 2-difluoro-4H-benzo[1, 4]oxazin-3-one)-6-yl]-5-fluoro-N2-[3-(methylaminocarbonylmethylene oxy)phenyl]-2, 4-pyrimidinediamine. This compound is a suitable drug substance and is useful in the treatment of conditions including asthma. |