Isoxazolopyrimidine derivatives

Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system

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C07D48704, A61K 31505

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active

045046620

ABSTRACT:
Isoxazolo[3,4-d]pyrimidines of the formula ##STR1## wherein R.sup.1 and R.sup.2, respectively, are lower alkyl; R.sup.3 is lower alkyl or acyl; and R.sup.4 is hydrogen, lower alkyl, or acyl have antiflammatory, analgesic and antipyretic activities in mammals and low acute and subacute toxicities, as well. The compounds are particularly useful as an antiinflammatory, analgesic and antipyretic drug.

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Hirota et al., Chemical Abstracts, vol. 95, 150,597a (1981).

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