Compounds of formula I ##STR1## including pharmaceutically acceptable salts thereof in which R.sub.1 represents a phenyl C.sub.1-6 alkyl group (in which the phenyl ring is optionally substituted by one or more of the following: halo, a C.sub.1-4 alkyl group, a C.sub.1-4 alkoxy group, hydroxy or trifluoromethyl) and the alkyl chain is optionally substituted by one or more C.sub.1-2 alkyl groups; R.sub.2 represents a C.sub.2-6 alkoxycarbonyl group; and R.sub.3 represents hydrogen or halo are disclosed, which are antirheumatic agents and are useful as modulators of cytokine synthesis, immunomodulatory agents, antiinflammatory agents and anti-allergic agents. Compositions containing these compounds and processes to make these compounds are also disclosed.
公式I的化合物包括其药用可接受的盐,其中R.sub.1代表苯基C.sub.1-6烷基基团(其中苯环可以选择地被以下一种或多种取代:卤素,C.sub.1-4烷基基团,C.sub.1-4烷氧基,羟基或三
氟甲基),烷基链可以选择地被一种或多种C.sub.1-2烷基基团取代;R.sub.2代表C.sub.2-6烷氧羰基基团;R.sub.3代表氢或卤素,这些化合物是抗风湿药物,可用作细胞因子合成调节剂,免疫调节剂,抗炎剂和抗过敏剂。还公开了含有这些化合物的组合物和制备这些化合物的方法。