Dioxo dibenzopyrans and anti-allergic use thereof

Details Dioxo dibenzopyrans and anti-allergic use thereof Dioxo dibenzopyrans and anti-allergic use thereof

1985-01-28

1987-06-02

Hollrah, Glennon H.

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Having -c-, wherein x is chalcogen, bonded directly to...

514455, 548253, 549382, C07D49302, C07D40514, A61K 3141, A61K 3135

Patent

active

046704523

ABSTRACT:
There are provided benzopyrans of formula I ##STR1## wherein R.sub.6 and R.sub.7 together form the chain --CHOCH.dbd.(A.sub.1 E.sub.1)--O-- in which --O-- is attached to R.sub.7,

REFERENCES:
patent: 3718668 (1973-02-01), Cairns et al.

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