Anti-allergic chromone- or thiochromone-5-oxamic acid derivative

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...

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514432, 514455, 514460, 549 23, 549 27, 549392, 549401, A61K 3135, A61K 3138, C07D30938, C07D33512

Patent

active

045714053

ABSTRACT:
Certain 5-substituted chromones and thiochromones and pharmacologically acceptable salts thereof are disclosed. The compounds possess antiallergic properties and are represented by the formula: ##STR1## wherein: X is selected from the group consisting of --O--, --S--, and --SO.sub.2 --;

REFERENCES:
patent: 4221800 (1980-09-01), Warren et al.
patent: 4290954 (1981-09-01), Onogi et al.
Murase et al., CA., vol. 95, 1981, 95:168567, pp. 579 & 580.
Yamanouchi et al., CA., vol. 98, 1983, 98:106990m, p. 573.

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