摘要 |
Compounds having the structure <IMAGE> and the pharmaceutically acceptable salts thereof, wherein R1 is hydrogen, <IMAGE> wherein X is alkyl or aryl, or <IMAGE> wherein Y is alkyl or aryl; R2 is hydrogen, halogen, alkyl, hydroxy, alkoxy or <IMAGE> R3 is hydrogen, halogen, alkyl, alkoxy, alkylthio, trifluoromethyl, or nitro; and n is 1, 2, or 3, have useful pharamacological properties.
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