Novel pyridine derivatives and process for preparing the same.

摘要

A compound of the formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="19" wi="51" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R<Sub>1</Sub> is a hydrogen atom or a lower alkyl group which may be substituted with hydroxy, lower alkyl or di-lower alkylamino; R<Sub>2</Sub> is a hydrogen atom, an amino group or a lower alkylamino group; and R<Sub>3</Sub> is a lower alkyl group, and a nontoxic salt thereof, and a process for preparing the same are disclosed.

The compound and the salts thereof exhibit antiallergic effects by the two different mechanisms and are expected to be useful as drugs for treating allergic diseases such as asthma, pollen allergy, atopic dermatitis and the like.