| 摘要 |
<p>Novel benzothiazine derivatives represented by the following general formula (I), process for their preparation, and agents for treating diseases of circulatory organs containing these compounds as effective ingredients: wherein R1 represents one or more groups selected from among a hydrogen atom, a lower alkyl group, a halogen atom, a nitro group, a hydroxy group, a lower alkoxy group, a lower alkanoyloxy group, an amino group, a lower alkylamino group and a lower alkoxycarbonyloxy group, R2 represents a hydrogen atom, a lower alkyl group or a (C¿3? - C6) cycloalkyl group, R?3¿ represents one or more of a hydrogen atom, a lower alkyl group, a hydroxy group, a lower alkoxy group, a halogen atom, a nitro group, a lower alkylenedioxy group, a lower alkanoyloxy group, alower alkanoyl group, an amino group, a lower alkylamino group, a lower alkanoylamino group and a lower alkoxycarbonyloxy group, or $(1,5)$(CH¿2)n, R?4 represents a hydrogen atom or a lower alkyl group, A and B which may be the same or different and each represents a lower alkylene group containing 1 to 6 carbon atoms, and n represents 3 or 4.</p> |
