| 摘要 |
Cpds. of formula (I) and their pharmaceutically acceptable salts, and inters. of formula (II) are new: (where R1-4 are each H, halogen, alkyl or alkoxy; or any two of R1-4 together with the C atoms to which they are bonded may form an opt. substd. carbocycle; X is a direct bond or O). (I) are used for inhibiting the effects of certain antigen-antibody reactions, e.g., in the prophylaxis and treatment of asthma, hay-fever and in treatment of rhinitis. (I) may be administered orally, by injection or by inhalation, doses being 0.1-100 mg./kg./day. |
