abstract |
Compounds of the formula (I): <IMAGE> (I) wherein R1 and R2 each is hydrogen, alkyl, alkoxycarbonyl, carboxy, halogen, nitro or trifluoromethyl, or R1 and R2 taken together may form alkylene; R3 is hydrogen, alkyl, alkanoyl or alkylsulfonyl; R4 is hydrogen, alkoxycarbonyl, carboxy or halogen; X is hydrogen, alkyl, alkoxy, halogen or hydroxy; and Y is methine or nitrogen or salts thereof are provided. The compounds (I) show potent psychotropic activity. |