| 摘要 |
Compounds of the formula <IMAGE> wherein R1 is hydrogen, chlorine, bromine or alkyl of 1 to 4 carbon atoms; R2 is hydrogen, fluorine, chlorine, bromine, nitro or trifluoromethyl; and R3 is chlorine, bromine, alkoxy of 1 to 3 carbon atoms, alkylmercapto of 1 to 3 carbon atoms, cycloalkyl of 3 to 6 carbon atoms, cycloalkenyl of 3 to 6 carbon atoms, or a saturated or unsaturated 5- to 6-membered heterocycle comprising an oxygen, sulfur or nitrogen heteroatom, where a substitutable nitrogen heteroatom may optionally have a lower akyl substituent attached thereto; and non-toxic, pharmacologically acceptable acid addition salts thereof; the compounds as well as their salts are useful as tranquilizers, muscle-relaxants and anticonvulsants.
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