Compounds of the formula ##STR1## and the pharmaceutically acceptable acid-addition salts thereof wherein R.sup.1 and R.sup.2 are hydrogen or alkyl of 1 to 4 carbons; R is hydrogen, alkyl of 1 to 4 carbons, alkanoyl of 2 to 5 carbons, or ##STR2## WHEREIN N IS 1, 2, OR 3; R.sup.3 is ##STR3## and X and X.sup.1 are hydrogen, halogen, alkyl of 1 to 4 carbons, alkoxy of 1 to 4 carbons, or trifluoromethyl are disclosed. These compounds are useful as central nervous system depressants and in particular as muscle relaxants.
本发明涉及式##STR1##化合物及其药学上可接受的酸加合物盐,其中R.sup.1和R.sup.2为氢或1至4碳的烷基;R为氢、1至4碳的烷基、2至5碳的酰基烷基,或##STR2##其中N为1、2或3;R.sup.3为##STR3##,X和X.sup.1为氢、卤素、1至4碳的烷基、1至4碳的烷氧基或三
氟甲基。这些化合物可用作中枢神经系统
抑制剂,特别是作为肌肉松弛剂。