TRICYCLIC PYRIDONE DERIVATIVES

The pyridone derivatives of the formula or -NR2R3; R1is an unsubstituted lower alkyl or a lower alkyl substituted by hydroxy, lower alkoxy, amino, lower alkylamino, di(lower alkyl)amino, di(lower alkyl)carbamoyl or lower alkoxycarbonylamino; R2 is hydrogen or a lower alkyl group which is unsubstituted or substituted by hydroxy, lower alkoxy, amino, lower alkylamino, di(lower alkyl)-amino, di(lower alkyl)carbamoyl or lower alkoxycarbonyl-amino; and R3 is hydrogen or lower alkyl optionally unsubstituted or mono- or disubstituted by lower alkyl, hydroxy, lower alkoxy, lower hydroxyalkyl, lower alkoxyalkyl or phenyl; B and the carbon atom denoted by alpha taken together is a group of the formula >C alpha -CR4=CH-CH=CH- and R4 is hydrogen, fluorine or chlorine, that can be used for the control or treatment of muscle tension, stress, insomnia, anxiety and/or convulsions.