| 发明名称 |
Dihydroxy and diacetoxy-3-formyl-chromones -antiallergic - agents for treatment of bronchial asthma and dermatosis |
| 摘要 |
<p>Title cpds. of formula: (where R1, R2 = hydroxy or acetoxy in the 5,6,7 or 8 posns) are prepd by a Vilsmeier reaction using a dihydroxy or diacetoxy-2-hydroxy-acetophenone.</p> |
| 申请公布号 |
BE777544(A1) |
申请公布日期 |
1972.04.17 |
| 申请号 |
BE19710777544 |
申请日期 |
1971.12.30 |
| 申请人 |
TAKEDA CHEMICAL INDUSTRIE LTD, 27, DOSHOMACHI 2-CHOME, HIGASHI-KU, OSAKA (JAPON), |
发明人 |
|
| 分类号 |
C07D311/22;(IPC1-7):07D/ |
主分类号 |
C07D311/22 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
