The present provides a condensed pyridine compound (I) represented by the following formula: ##STR1## (wherein, R.sup.2 represents ##STR2## ring A represents benzene ring, pyridine ring, thiophene ring or furan ring; and B represents ##STR3## its pharmaceutically acceptable salt or hydrates thereof, which is a clinically useful medicament having a serotonin antagonism, in particular, that for treating, ameliorating or preventing spastic paralysis or central muscle relaxants for ameliorating myotonia.

O presente fornece um composto condensado do pyridine (I) representado pela seguinte fórmula: ## do ## STR1 (wherein, R.sup.2 representa o anel A do ## do ## STR2 representa o anel do benzene, o anel do pyridine, o anel do thiophene ou o anel do furan; e B representa o ## do ## STR3 seus sal ou hydrates pharmaceutically aceitáveis disso, que é um medicament clìnica útil que tem um antagonism do serotonin, no detalhe, que para tratar, melhorar ou impedir o paralysis spastic ou relaxants centrais do músculo para o myotonia melhorando.

 
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