| 摘要 |
1527236 3 - Cinnamoyl - 2H- pyran - 2,6(3H)- diones SMITHKLINE CORP 11 Sept 1975 [2 Oct 1974] 37418/75 Heading C2C The invention comprises compounds having the formula wherein R is hydrogen, methyl, methoxy, hydroxy, carboxy-methyleneoxy, acetamido or 3- acetamido-4-hydroxy-. They may be prepared by reacting a compound of formula with a compound of formula The compounds of the Formula I wherein R has the stated meanings and may also be dimethoxy may be used for the treatment of allergic diseases and may be administered orally, parenterally or by inhalation. |
