| 摘要 |
The invention is related to compounds, being useful in treating psychosis, of the formula: <IMAGE> wherein: R1 is hydrogen, lower-alkyl, phenyl-lower-alkyl, C3-C7-monocyclic cycloalkyl-lower-alkyl, or hydroxy-C3-C7-monocycliccycloalkyl-lower-alkyl; R2 is lower-alkyl; R3 is hydrogen or lower-alkyl; R4 is lower-alkyl; n is an integer from zero to three; and R5 is hydroxy, lower-alkoxy, lower-alkyl, C3-C7-monocyclic cycloalkyl, phenyl, or a 5-membered heterocycle selected from furanyl, thienyl and isoxazolyl; with the proviso that when n is zero, R5 is other than hydroxy or a pharmaceutically acceptable acid-addition salt thereof.
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