Pharmaceutical compositions comprising 4-hydroxy-2-quinolinone-3- carboxylic acids and their salts, and certain compounds of this class, for example 1-allyl-6,7-dimethoxy-4-hydroxy -2-quinolinone-3- carboxylic acid; of the formula
They may be prepared by hydrolysis of the correspond- ling alkyl esters.
The compounds are useful in the prophylactic treatment of allergic asthma.
由
4-羟基-2-
喹啉酮-3-
羧酸及其盐类和某些该类化合物(例如 1-烯丙基-6,7-二甲氧基-
4-羟基-2-
喹啉酮-3-
羧酸)组成的药物组合物,其式为
它们可以通过
水解相应的烷基酯来制备。
这些化合物可用于过敏性哮喘的预防性治疗。