| 摘要 |
Novel 3-(tetrazol-5-yl)-1-azaxanthone and its derivatives, which are shown by the following formula <IMAGE> wherein R1 is hydrogen, amino or hydroxyl; R2 is alkyl, alkoxy, halogen, nitro, carboxyl, hydroxyl, butadienylene (-CH=CH-CH=CH-) which forms a benzene ring with any adjacent carbon atoms or amino group which may be unsubstituted or substituted by at least one alkyl; and m is 0, 1 or 2; and their physiologically acceptable salts, are usable as effective medicines for preventing and/or treating allergic diseases. |
