Isoxazolo[3,4-d]pyrimidines of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 respectively, are hydrogen, lower alkyl, cycloalkyl, or aryl which may be substituted by halogen, are useful as antiinflammatory-analgesic drugs, and the industrially feasible production thereof is provided.
式为##STR1##的
异噁唑并[3,4-d]
嘧啶化合物,其中R.sup.1,R.sup.2和R.sup.3分别为氢,低级烷基,环烷基或芳基,该芳基可能被卤素取代,可用作抗炎痛药物,并提供了其工业上可行的制备方法。