| 摘要 |
The present invention provides novel compounds of the formula, <IMAGE> wherein R1 is hydrogen, halogen, alkyl or alkoxy; R2 may, for example, be hydrogen, alkyl, alkenyl, alkinyl or phenylalkyl, the phenyl ring of which may be mono-substituted with halogen, alkyl or alkoxy; and R3 is hydrogen, alkyl, thienyl, phenyl or phenyl which may be mono- or di-substituted with halogen, alkyl, alkoxy or alkylthio, useful, for example, as anti-depressants and analgesics. |
