abstract |
This invention discloses novel 1-oxo-5H-pyrimido[2,1-c][1,4]benzoxa(or thia)zine-2-carboxylic acid lower alkyl esters, derivatives thereof, process for their preparation, pharmaceutical compositions thereof and methods for using the compounds. The compounds of this invention are useful in the treatment of anaphylactic reactions and allergic conditions in a mammal. |