申请人:SmithKline Corporation
公开号:US04025642A1
公开(公告)日:1977-05-24
Substituted 2H-pyran-2,6(3H)-dione derivatives useful in the treatment of allergic conditions are prepared by reaction of 3,5-diacetyl-4,6-dihydroxy-2H-pyran-2-one with an appropriate aniline.
用于治疗过敏症的2H-吡喃-2,6(3H)-二酮衍生物是通过将3,5-二乙酰基-4,6-二羟基-2H-吡喃-2-酮与适当的苯胺反应制备的。