| 摘要 |
A compound of formula (I): wherein: R<1 >and R<2 >together form a benzo ring optionally substituted by halogen or by alkyl, alkoxy, cyano, nitro, hydroxy, amino, alkylamino, dialkylamino or trifluoromethyl, and R<3 >and R<4 >represent hydrogen, or R<1 >and R<4 >represent hydrogen and R<2 >and R<3 >together form a benzo ring optionally substituted by halogen or by alkyl, alkoxy, cyano, nitro, hydroxy, amino, alkylamino, dialkylamino or trifluoromethyl, or R<1 >and R<2 >represent hydrogen and R<3 >and R<4 >together form a benzo ring optionally substituted by halogen or by alkyl, alkoxy, cyano, nitro, hydroxy, amino, alkylamino, dialkylamino or trifluoromethyl, addition salts thereof with a pharmaceutically acceptable acid or base, and methods of treating conditions susceptible to alpha2-AR/5-HT2C antagonists.
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