Benzopyranotriazoles

Drug – bio-affecting and body treating compositions – Antigen – epitope – or other immunospecific immunoeffector – Parasitic organism or component thereof or substance...

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Details

260453A, 548101, 548255, 424245, A61K 3141, C07D491056, C07D491153

Patent

active

042488796

ABSTRACT:
Compounds of the formula (I): ##STR1## and pharmaceutically acceptable salts thereof wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 which may be the same of different, represent hydrogen, halogen, nitro, lower alkyl, and lower alkoxy, or any adjacent two of R.sub.1 to R.sub.4 taken together represent an alkylene group containing from 3 to 5 carbon atoms or a 1,4-buta-1,3-dienylene group are disclosed. The compounds are useful as anti-allergic agents.

REFERENCES:
patent: 3968119 (1976-07-01), Harnisch

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