A compound selected from the group consisting of all possible isomeric forms, optically active isomers and racemic mixtures of compounds of the formula ##STR1## wherein R.sub.1 and R.sub.2 are individually selected from the group consisting of hydrogen, halogen, alkyl and alkoxy of 1 to 5 carbon atoms, --OH, --CF.sub.3 and --NO.sub.2, R is selected from the group consisting of hydrogen, alkyl of 1 to 5 carbon atoms, aralkyl of 7 to 12 carbon atoms, benzoyl and acyl of an alkanoic acid of 1 to 12 alkyl carbon atoms and ##STR2## is selected from the group consisting of ##STR3## and their non-toxic, pharmaceutically acceptable acid addition salts having analgesic activity as well as cerebral oxygenating and vaso regulating activity.
该化合物是从公式##STR1##的所有可能的同分异构体、旋光异构体和混合物中选择的,其中R.sub.1和R.sub.2分别选择自氢、卤素、1至5个碳原子的烷基和烷氧基、--OH、--CF.sub.3和--NO.sub.2的群,R选择自氢、1至5个碳原子的烷基、7至12个碳原子的芳基烷基、苯甲酰和1至12个碳原子的烷基
羧酸酰基,##STR2##选择自##STR3##的群,以及它们的非毒性、药学上可接受的酸加合盐,具有镇痛活性以及脑氧合和血管调节活性。