| 摘要 |
Compounds of the general formula I <IMAGE> (I) wherein n represents 0, 1 or 2, A represents oxygen or sulphur, Z represents oxygen or hydroxyimino, X represents hydrogen, or halogen, the dotted lines represent bonds which may be unsaturated or saturated, R1 and R2 each represent hydrogen or alkyl, and R3 represents hydrogen, halogen or methyl, and R4 represents a hydrogen atom, or R3 and R4 together with the two carbon atoms to which they are attached represent benzene, and their pharmaceutically acceptable salts are useful in therapy, in particular as uricosuric agents or as diuretic and uricosuric agents. |
