The invention relates to xanthines corresponding to the formula ##STR1## and physiologically acceptable salts thereof, in which R.sub.1 represents C.sub.2 -C.sub.4 -alkyl, C.sub.3 -C.sub.4 -isoalkyl, CH.sub.2 -(C.sub.2 -C.sub.3 -alkenyl) or CH.sub.2 -(C.sub.3 -isoalkenyl); R.sub.3 represents C.sub.3 -C.sub.5 -alkyl, C.sub.3 -C.sub.5 -isoalkyl, CH.sub.2 -(C.sub.2 -C.sub.4 -alkenyl) or CH.sub.2 -(C.sub.3 -C.sub.4 -isoalkenyl); R.sub.8 represents H, methyl or ethyl; with the proviso that (1) when R.sub.8 represents H, R.sub.1 is allyl and (2) R.sub.1 and R.sub.3 cannot both represent butyl or allyl at the same time. The compounds show non-specific or anxiolytic sedative activity.
该发明涉及与以下结构式相对应的
黄嘌呤(xanthines)及其生理上可接受的盐:其中R.sub.1代表C.sub.2 -C.sub.4-烷基,C.sub.3 -C.sub.4-异烷基,CH.sub.2 -(C.sub.2 -C.sub.3-烯基)或CH.sub.2 -(C.sub.3-异烯基);R.sub.3代表C.sub.3 -C.sub.5-烷基,C.sub.3 -C.sub.5-异烷基,CH.sub.2 -(C.sub.2 -C.sub.4-烯基)或CH.sub.2 -(C.sub.3 -C.sub.4-异烯基);R.sub.8代表H,甲基或乙基;但条件是(1)当R.sub.8代表H时,R.sub.1是烯丙基,(2)R.sub.1和R.sub.3不能同时代表丁基或烯丙基。这些化合物具有非特异性或抗焦虑镇静活性。