Tetrazolylcoumarin derivatives, process for preparing the same and composition containing the same.

摘要

Tetrazolylcoumarin derivatives of the general formula:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="24" wi="71" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R is hydrogen atom, an alkyl group, an alkenyl group, an alkoxyalkyl group or phenyl group, n is an integer of 2 to4, and the R-O-(CH<Sub>2</Sub>)<Sub>n</Sub>-O- group is substituted at any of the 5,6,7, and 8 positions of the coumarin ring, and the salts thereof. The compounds are useful as antiallergic agents for preventing and treating allergic diseases.