申请人:Warner-Lambert Company
公开号:US04198511A1
公开(公告)日:1980-04-15
The present invention relates to 1,5-dihydro-1,5-dioxo-N-1H-tetrazol-5-yl-4H-[1]benzopyrano[3,4-b]pyridine- 3-carboxamides having the following structural formula: ##STR1## wherein R.sub.1 is hydrogen, halogen, hydroxy, lower alkoxy, lower alkyl or nitro and R.sub.2 is hydrogen or lower alkyl. These compounds and their pharmaceutically acceptable salts are useful in the management of allergic manifestations such as bronchial asthma, hay fever and the like.
本发明涉及以下结构式的1,5-二氢-1,5-二氧化-N-1H-四唑-5-基-4H-[1]苯并吡啶[3,4-b]吡啶-3-羧酰胺:其中R.sub.1是氢,卤素,羟基,低烷氧基,低烷基或硝基,R.sub.2是氢或低烷基。这些化合物及其药学上可接受的盐在过敏症状管理中很有用,例如支气管哮喘,花粉热等。