Compounds of the formula <IMAGE> wherein R1 is hydrogen, halogen or methyl, and R2 is hydrogen, halogen, methyl or methoxy, and non-toxic, pharmacologically acceptable acid addition salts thereof; the compounds as well as their salts are useful as neuroleptics.
2-(4-Phenyl-4-cyano-n-butyl)-1,2,3,4-tetrahydro-5(H)-pyrido-{8 4,3-b{9 -indoles and salts thereof