| 摘要 |
<p>Novel 1,4-thiazine derivatives represented by general formula (I) wherein R1 and R2 each represents a hydrogen atom, a lower alkyl group, a lower alkoxy group, an amino group, a lower alkylamino group, an arylamino group, a hydroxy group, an aryl group, a 5- or 6-membered heterocyclic ring residue, R3 and R4 each represents a hydrogen atom or a lower alkyl group, R5 represents a nitrogen-containing ring residue (provided that, when R1 and R2 represent a hydrogen atom and R3 and R4 each represents a hydrogen atom or a lower alkyl group, R5 does not represent a pyridinyl group) and pharmacologically acceptable acid addition salts thereof, process for their preparation, and cardiotonics containing them as effective ingredients.</p> |
