| abstract |
This invention relates to 1-azaindolizine derivatives represented by general formula (I), wherein R1 and R2 represent each independently hydrogen, halogen, C1 to C4 alkyl or C1 to C4 alkoxy, and R3 represents C1 to C6 alkyl, C1 to C4 alkyl substituted by C3 to C5 cycloalkyl, hydroxy, acetylamino, C1 to C4 alkoxy or cyano, or C2 to C4 alkenyl, intermediates for use in the synthesis thereof, and antiallergics containing said derivatives. |